Allow rhsm subscription test to be overrided in RHOSP deployment.

This allow the master playbook used for update to set
tripleo_redhat_enforce to false on a per role basis on Red Hat
environment.

The default in defaults/main.yml is now "true" so that it keeps its
behavior of being run by default if nothing is changed in the role
definition.

We then avoid running it on other plateform than Red Hat by adding an
explicit test in that tasks/main.yml file.

Overall the behavior is as follows:

  | Red Hat Env | tripleo_enforced     | Test run |
  |-------------+----------------------+----------|
  | True        | Unset                | Yes      |
  | True        | Set to true in role  | Yes      |
  | True        | Set to false in role | No       |
  | False       | Doesn't matter       | No       |

Change-Id: I6268a01d16f8288bf862003d19184fc93b88282a
Partial-Bug: #1912512

tripleo_ansible/roles/tripleo_redhat_enforce/defaults/main.yml

@@ -19,6 +19,6 @@
 
 # All variables within this role should have a prefix of "tripleo_redhat_enforce"
 tripleo_redhat_enforce_debug: "{{ (ansible_verbosity | int) >= 2 | bool }}"
-tripleo_redhat_enforce: false
+tripleo_redhat_enforce: true
 tripleo_redhat_enforce_osp: ''
 tripleo_redhat_enforce_os: ''

tripleo_ansible/roles/tripleo_redhat_enforce/tasks/enforce_release.yml

@@ -18,7 +18,7 @@
       https://access.redhat.com/documentation/en-us/red_hat_openstack_platform/16.0/html-single/
       director_installation_and_usage/index#configuring-the-undercloud-with-environment-files,
       for the Overcloud you need to add a new parameter file to your deploy
-      command with that parameter set.
+      command with that parameter set. You can also disable it in the role, see rhsm_enforce role parameter.
       If this is unexpected, you have to subscribe this node and
       ensure that RHEL is pinned to {{ tripleo_redhat_enforce_os }} as
       this is the only version supported for {{ tripleo_redhat_enforce_osp }}.
@@ -41,5 +41,6 @@
       OSP{{ tripleo_redhat_enforce_osp }} is only supported with Red Hat {{ tripleo_redhat_enforce_os }}.
       Please make sure to pin rhel to {{ tripleo_redhat_enforce_os }} using:
       subscription-manager release --set={{ tripleo_redhat_enforce_os }}.
-      You can then proceed with the update.
+      You can then proceed with the update. You can also disable it in the
+      role, see rhsm_enforce role parameter, if this is expected.
   when: tripleo_redhat_enforce_os not in subscribed_release.stdout

tripleo_ansible/roles/tripleo_redhat_enforce/tasks/main.yml

@@ -33,4 +33,6 @@
 
 - include_tasks: enforce_release.yml
   name: Enforce RHEL/OSP version pair
-  when: tripleo_redhat_enforce|bool
+  when:
+    - (ansible_distribution | lower) == "redhat"
+    - tripleo_redhat_enforce|bool

tripleo_ansible/roles/tripleo_redhat_enforce/vars/redhat.yml

@@ -18,6 +18,5 @@
 # All variables intended for modification should be placed in this file.
 
 # All variables within this role should have a prefix of "tripleo_redhat_enforce"
-tripleo_redhat_enforce: true
 tripleo_redhat_enforce_osp: ''
 tripleo_redhat_enforce_os: ''