This patch splits helm-upgrade-from-source task from the helm directory

Changes include:
  - moves helm-upgrade-from-source task to the task directory
  - copies and modifies readme file for helm-upgrade-from-source from helm directory
  - copies OWNERS,examples and tests directory from helm directory

Issue: tektoncd#386

Signed-off-by: Puneet Punamiya <[email protected]>

task/helm-upgrade-from-source/0.1/OWNERS

@@ -0,0 +1,5 @@
+approvers:
+- fhopfensperger
+
+reviewers:
+- fhopfensperger

task/helm-upgrade-from-source/0.1/README.md

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+# Helm
+
+These tasks will install / upgrade a helm chart into your Kubernetes / OpenShift Cluster using [Helm](https://github.com/helm/helm).
+
+## Install the Task
+
+### helm install / upgrade from source code
+
+```
+kubectl apply -f https://raw.githubusercontent.com/tektoncd/catalog/master/task/helm-upgrade-from-source/0.1/helm-upgrade-from-source.yaml
+```
+
+#### Parameters
+
+- **charts_dir**: The directory in the source repository where the installable chart should be found.
+- **release_version**: The version of the release (*default: v1.0.0*)
+- **release_name**: The name of the release (*default: helm-release*)
+- **release_namespace**: The namespace in which the release is to be installed (*default: ""*)
+- **overwrite_values**: The values to be overwritten (*default: ""*)
+- **helm_version**: The helm version which should be used (*default: latest*)
+
+#### Workspaces
+
+* **source**: A [Workspace](https://github.com/tektoncd/pipeline/blob/master/docs/workspaces.md) volume containing the helm chart.
+
+## Usage
+
+### PipelineRun
+
+An example `Pipeline` with a `PipelineRun` can be found in the subdirectory `tests`.
+
+### TaskRun
+
+This `TaskRun` runs the task to retrieve a Git repo and then installs/updates the helm chart that is in the Git repo.
+
+```yaml
+# example upgrade from source
+apiVersion: tekton.dev/v1beta1
+kind: TaskRun
+metadata:
+  name: example-helm-upgrade-from-source
+spec:
+  taskRef:
+    name: helm-upgrade-from-source
+  params:
+  - name: charts_dir
+    value: helm-sample-chart
+  - name: releases_version
+    value: v1.0.0
+  - name: release_name
+    value: helm-source-sample
+  - name: overwrite_values
+    value: "autoscaling.enabled=true,autoscaling.maxReplicas=3"
+  workspaces:
+  - name: source
+    persistentVolumeClaim:
+      claimName: my-source
+```

task/helm-upgrade-from-source/0.1/example/helm-upgrade-from-repo-task-run.yaml.tmpl

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+apiVersion: tekton.dev/v1beta1
+kind: TaskRun
+metadata:
+  name: example-helm-upgrade-from-repo
+spec:
+  taskRef:
+    name: helm-upgrade-from-repo
+  params:
+  - name: helm_repo
+    value: https://kubernetes-charts.storage.googleapis.com
+  - name: chart_name
+    value: stable/envoy
+  - name: release_version
+    value: v1.0.0
+  - name: release_name
+    value: helm-repo-sample
+  - name: overwrite_values
+    value: autoscaling.enabled=true,autoscaling.maxReplicas=3

task/helm-upgrade-from-source/0.1/example/helm-upgrade-from-source-task-run.yaml.tmpl

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+apiVersion: tekton.dev/v1beta1
+kind: TaskRun
+metadata:
+  name: example-helm-upgrade-from-source
+spec:
+  taskRef:
+    name: helm-upgrade-from-source
+  params:
+    - name: charts_dir
+      value: helm-sample-chart
+    - name: releases_version
+      value: v1.0.0
+    - name: release_name
+      value: helm-source-sample
+    - name: overwrite_values
+      value: "autoscaling.enabled=true,autoscaling.maxReplicas=3"
+  workspaces:
+    - name: source
+      persistentVolumeClaim:
+        claimName: my-source

task/helm-upgrade-from-source/0.1/tests/pre-apply-task-hook.sh

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+#!/bin/bash
+
+# Add git-clone
+kubectl -n ${tns} apply -f ./git/git-clone.yaml
+
+# Add service account
+kubectl -n ${tns} create serviceaccount helm-pipeline-run-sa -o yaml --dry-run=client | kubectl apply -f -
+
+# Add edit role to service account
+kubectl -n ${tns} create rolebinding helm-pipeline-run-sa-edit --clusterrole edit --serviceaccount ${tns}:helm-pipeline-run-sa -o yaml --dry-run=client | kubectl apply -f -

task/helm-upgrade-from-source/0.1/tests/resources.yaml

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+---
+apiVersion: v1
+kind: PersistentVolumeClaim
+metadata:
+  name: helm-source-pvc
+spec:
+  accessModes:
+    - ReadWriteOnce
+  resources:
+    requests:
+      storage: 200Mi

task/helm-upgrade-from-source/0.1/tests/run.yaml

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+---
+apiVersion: tekton.dev/v1beta1
+kind: Pipeline
+metadata:
+  name: helm-upgrade-test-pipeline
+spec:
+  workspaces:
+    - name: shared-workspace
+  tasks:
+    - name: helm-upgrade-from-repo
+      taskRef:
+        name: helm-upgrade-from-repo
+      params:
+        - name: helm_repo
+          value: https://kubernetes-charts.storage.googleapis.com
+        - name: chart_name
+          value: stable/envoy
+        - name: release_version
+          value: v1.0.0
+        - name: release_name
+          value: helm-repo-sample
+        - name: overwrite_values
+          value: autoscaling.enabled=true,autoscaling.maxReplicas=3
+    - name: fetch-repository
+      taskRef:
+        name: git-clone
+      workspaces:
+        - name: output
+          workspace: shared-workspace
+      params:
+        - name: url
+          value: https://github.com/fhopfensperger/tekton-helm-sample.git
+        - name: subdirectory
+          value: ""
+        - name: deleteExisting
+          value: "true"
+    - name: helm-upgrade-from-source
+      taskRef:
+        name: helm-upgrade-from-source
+      runAfter:
+        - fetch-repository
+      workspaces:
+        - name: source
+          workspace: shared-workspace
+      params:
+        - name: charts_dir
+          value: helm-sample-chart
+        - name: release_version
+          value: v1.0.0
+        - name: release_name
+          value: helm-source-sample
+        - name: overwrite_values
+          value: "autoscaling.enabled=true,autoscaling.maxReplicas=3"
+---
+apiVersion: tekton.dev/v1beta1
+kind: PipelineRun
+metadata:
+  name: helm-upgrade-test-pipeline-run
+spec:
+  serviceAccountName: helm-pipeline-run-sa
+  pipelineRef:
+    name: helm-upgrade-test-pipeline
+  workspaces:
+    - name: shared-workspace
+      persistentvolumeclaim:
+        claimName: helm-source-pvc