Update tripleo-validations path to /usr/share/ansible

According to: https://review.rdoproject.org/r/#/c/29059/
We decide to converge ansible roles/libraries/plugin and playbooks to
the /usr/share/ansible path instead of having a dedicated path for
validations.
This will avoid duplication since the validation-framework is now
an external framework from tripleo, the common validations between
validations-common and tripleo-validations can be stored at the same
place.

Add a fallback path for Updates and Upgrades

Change-Id: Ibe97d70f4d321d04900ca9fe88144bc16511611c

tripleoclient/constants.py

@@ -93,7 +93,10 @@ ENABLE_SSH_ADMIN_SSH_PORT_TIMEOUT = 600
 
 ADDITIONAL_ARCHITECTURES = ['ppc64le']
 
-DEFAULT_VALIDATIONS_BASEDIR = '/usr/share/openstack-tripleo-validations'
+DEFAULT_VALIDATIONS_BASEDIR = (
+    "/usr/share/ansible"
+    if os.path.exists("/usr/share/ansible/validation-playbooks")
+    else "/usr/share/openstack-tripleo-validations")
 
 VALIDATIONS_LOG_BASEDIR = '/var/log/validations'
 
@@ -103,8 +106,11 @@ DEFAULT_WORK_DIR = os.path.join(os.environ.get('HOME', '~/'),
 ANSIBLE_INVENTORY = os.path.join(DEFAULT_WORK_DIR,
                                  '{}/tripleo-ansible-inventory.yaml')
 
-ANSIBLE_VALIDATION_DIR = \
-    '/usr/share/openstack-tripleo-validations/playbooks'
+ANSIBLE_VALIDATION_DIR = (
+    "/usr/share/ansible/validation-playbooks"
+    if os.path.exists("/usr/share/ansible/validation-playbooks")
+    else "/usr/share/openstack-tripleo-validations/playbooks")
+
 ANSIBLE_TRIPLEO_PLAYBOOKS = \
     '/usr/share/ansible/tripleo-playbooks'
 

tripleoclient/tests/v1/tripleo/test_tripleo_validator.py

@@ -50,7 +50,7 @@ VALIDATIONS_LOGS_CONTENTS_LIST = [{
             'id': '008886df-d297-1eaa-2a74-000000000008',
             'validation_id': '512e',
             'validation_path':
-            '/usr/share/openstack-tripleo-validations/playbooks'
+            '/usr/share/ansible/validation-playbooks'
         },
         'tasks': [
             {