install collection deps before import test

A collection import test may fail if the are not installed.
We now install the collections locally, this way `ansible-galaxy` will
pull the depdendencies for us.

See: ansible-collections/community.general#402

playbooks/build-ansible-collection/run.yaml

@@ -31,6 +31,10 @@
         patterns: "*.tar.gz"
       register: result
 
+    - name: Install the Collections locally, to be sure the dependencies get pulled
+      command:  "{{ ansible_galaxy_executable }} collection install {{ item.path }}"
+      loop: "{{ result.files }}"
+
     - name: Confirm collection can be imported into galaxy
       loop: "{{ result.files }}"
       when: "item.path.endswith('.tar.gz')"