[2.8] tower_role: ensure alias of "validate_certs" parameter is handled

* tower_role: ensure alias of validate_certs is handled

* tower modules: remove tower_verify_ssl alias too

Error was:

    Failed to update role: The Tower server claims it was sent a bad request.
    GET https://tower/api/v2/projects/22/object_roles/
    Params: [('tower_verify_ssl', False), ('role_field', 'admin_role')]
    Data: None
    Response: {"detail": "Role has no field named 'tower_verify_ssl'"}

Full traceback:

    File "/tmp/ansible_tower_role_payload_7_2p0X/__main__.py", line 145, in main
      result = role.grant(**params)
    File "/usr/local/lib/python2.7/dist-packages/tower_cli/resources/role.py", line 365, in grant
      return self.role_write(fail_on_found=fail_on_found, **kwargs)
    File "/usr/local/lib/python2.7/dist-packages/tower_cli/resources/role.py", line 242, in role_write
      fail_on_multiple_results=True, **data)
    File "/usr/local/lib/python2.7/dist-packages/tower_cli/models/base.py", line 301, in read
      r = client.get(url, params=params)
    File "/usr/local/lib/python2.7/dist-packages/requests/sessions.py", line 546, in get
      return self.request('GET', url, **kwargs)
    File "/usr/local/lib/python2.7/dist-packages/tower_cli/api.py", line 299, in request
      kwargs.get('data', None), r.content.decode('utf8'))

(cherry picked from commit 77e01e6abc)

changelogs/fragments/57518-tower_role-fix_validate_certs.yml

@@ -0,0 +1,2 @@
+minor_changes:
+  - fix exception when tower_verify_ssl parameter is used in tower_role module (https://github.com/ansible/ansible/pull/57518).

lib/ansible/module_utils/ansible_tower.py

@@ -70,6 +70,7 @@ def tower_auth_config(module):
         password = module.params.pop('tower_password', None)
         if password:
             auth_config['password'] = password
+        module.params.pop('tower_verify_ssl', None)  # pop alias if used
         verify_ssl = module.params.pop('validate_certs', None)
         if verify_ssl is not None:
             auth_config['verify_ssl'] = verify_ssl

test/integration/targets/tower_role/tasks/main.yml

@@ -27,6 +27,14 @@
     that:
       - "result is changed"
 
+- name: Test tower_verify_ssl alias
+  tower_role:
+    user: joe
+    role: update
+    project: Demo Project
+    tower_verify_ssl: true
+    state: absent
+
 - name: Delete a User
   tower_user:
     username: joe