Reduce CI load on failing PR

This PR changes the staging of CI jobs to not run native tests
if the JVM tests fail. It also removes the dedicated 'build for
native' job, and instead uses the results of the JDK8 build
to run the native build, further reducing the load.

azure-pipelines.yml

@@ -87,33 +87,6 @@ stages:
               mavenOptions: $(MAVEN_OPTS)
               options: '-B --settings azure-mvn-settings.xml -DskipTests=true -Dno-format -DskipDocs'
 
-  #This stage builds the Quarkus artifacts needed for native image testing
-  - stage: build_artifact_for_native_stage
-    displayName: 'Build for Native'
-    dependsOn: cache_maven_repo_stage
-    jobs:
-      - job: Build_JDK8_Linux
-        displayName: 'Build JDK8 Linux'
-        timeoutInMinutes: 60
-        pool:
-          vmImage: 'Ubuntu 16.04'
-        steps:
-          - task: CacheBeta@0 #we know the very first job will have restored or created this, so this will never write built artifacts to the cache
-            inputs:
-              key: maven | bom/runtime/pom.xml
-              path: $(Pipeline.Workspace)/.m2/repository/
-              securityNamespace: cache
-            displayName: Restore Maven Cache
-
-          - task: Maven@3
-            displayName: 'Maven Build'
-            inputs:
-              goals: 'install'
-              mavenOptions: $(MAVEN_OPTS)
-              options: '-DskipTests -Dno-format'
-          - publish: $(MAVEN_CACHE_FOLDER)
-            artifact: BuiltMavenRepo
-
   - stage: run_jvm_tests_stage
     displayName: 'Run JVM Tests'
     dependsOn: cache_maven_repo_stage
@@ -126,6 +99,8 @@ stages:
           vmImage: 'Ubuntu 16.04'
         steps:
           - template: ci-templates/jvm-build-steps.yaml
+          - publish: $(MAVEN_CACHE_FOLDER)
+            artifact: BuiltMavenRepo
 
       - job: Windows_Build
         displayName: 'Windows JVM Build'
@@ -190,7 +165,7 @@ stages:
 
   - stage: run_native_tests_stage
     displayName: 'Native Tests'
-    dependsOn: build_artifact_for_native_stage
+    dependsOn: run_jvm_tests_stage
     jobs:
       - template: ci-templates/native-build-steps.yaml
         parameters: