ansible-pulp CI should test the calling roles from dynamic

"include_role" with the source dirs of the branch

Implementation includes:
1. new source-dynamic scenario, using vars from example-source
2. "dynamic" now uses same vars as in example-use (which facilitates
documentation for users.)

fixes: #6071
https://pulp.plan.io/issues/6071

molecule/dynamic/group_vars

@@ -0,0 +1 @@
+../../example-use/group_vars

molecule/dynamic/playbook.yml

@@ -8,11 +8,16 @@
         that: "ansible_version.full is version_compare('2.8', '>=')"
         msg: >
           "You must update Ansible to at least 2.8 to use this version of Pulp 3 Installer."
-
+  tasks:
     - name: Dynamically include prereq roles
       include_role:
         name: "{{ roleinputvar }}"
-      loop: "{{ pulp_roles }}"
+      loop:
+        - pulp-database
+        - pulp-workers
+        - pulp-resource-manager
+        - pulp-webserver
+        - pulp-content
       loop_control:
         loop_var: roleinputvar
   environment:

molecule/source-dynamic/.ansible-lint

@@ -0,0 +1 @@
+../../.ansible-lint

molecule/source-dynamic/Dockerfile.j2

@@ -0,0 +1 @@
+../scenario_resources/Dockerfile.j2

molecule/source-dynamic/debian-redis-server.service

@@ -0,0 +1 @@
+../scenario_resources/debian-redis-server.service

molecule/source-dynamic/group_vars

@@ -0,0 +1 @@
+../../example-source/group_vars

molecule/source-dynamic/molecule.yml

@@ -0,0 +1,57 @@
+---
+dependency:
+  name: galaxy
+  role-file: requirements.yml
+driver:
+  name: docker
+lint:
+  name: yamllint
+# This is ignored by molecule, but can be reused in yaml
+.platform_base: &platform_base
+  privileged: False
+  volumes:
+    - /sys/fs/cgroup:/sys/fs/cgroup:ro
+  tmpfs:
+    - /tmp
+    - /run
+    - /run/lock
+  capabilities:
+    - NET_ADMIN
+    - NET_RAW
+platforms:
+  - <<: *platform_base
+    name: debian-10
+    image: debian:buster
+    command: /sbin/init
+  - <<: *platform_base
+    name: fedora-31
+    image: fedora:31
+    command: /usr/sbin/init
+provisioner:
+  name: ansible
+  inventory:
+    links:
+      host_vars: ../scenario_resources/host_vars/
+      group_vars: ../scenario_resources/group_vars/
+  lint:
+    name: ansible-lint
+scenario:
+  name: source-dynamic
+  test_sequence:
+    - lint
+    - dependency
+    - syntax
+    - create
+    - prepare
+    - converge
+    - idempotence
+    - side_effect
+    - verify
+  playbooks:
+    prepare: prepare.yml
+
+verifier:
+  name: inspec
+  lint:
+    name: rubocop
+    enabled: false

molecule/source-dynamic/playbook.yml

@@ -0,0 +1,25 @@
+---
+- hosts: all
+  pre_tasks:
+    # The version string below is the highest of all those in roles' metadata:
+    # "min_ansible_version". It needs to be kept manually up-to-date.
+    - name: Verify Ansible meets min required version
+      assert:
+        that: "ansible_version.full is version_compare('2.8', '>=')"
+        msg: >
+          "You must update Ansible to at least 2.8 to use this version of Pulp 3 Installer."
+  tasks:
+    - name: Dynamically include prereq roles
+      include_role:
+        name: "{{ roleinputvar }}"
+      loop:
+        - pulp-database
+        - pulp-workers
+        - pulp-resource-manager
+        - pulp-webserver
+        - pulp-content
+        - pulp-devel
+      loop_control:
+        loop_var: roleinputvar
+  environment:
+    DJANGO_SETTINGS_MODULE: pulpcore.app.settings

molecule/source-dynamic/prepare.yml

@@ -0,0 +1 @@
+../source/prepare.yml

molecule/source-dynamic/requirements.yml

@@ -0,0 +1 @@
+../../requirements.yml

molecule/source-dynamic/roles

@@ -0,0 +1 @@
+../../roles

molecule/source-upgrade/prepare.yml

@@ -0,0 +1 @@
+../source/prepare.yml

tox.ini

@@ -34,7 +34,11 @@ sitepackages = {[testenv]sitepackages}
 deps = {[testenv]deps}
 passenv = {[testenv]passenv}
 whitelist_externals = {[testenv]whitelist_externals}
-commands = {env:TRAVIS_WAIT:} molecule test -s dynamic
+commands =
+    {env:TRAVIS_WAIT:} molecule test -s dynamic
+    molecule destroy -s dynamic
+    molecule test -s source-dynamic
+    # only the last scenario should lack a "destroy" task. (It wastes time, and makes debugging more difficult.)
 
 [testenv:py36-dynamic]
 sitepackages = {[testenv]sitepackages}