Convert dynamic includes to static imports

When task/role files are included using include_tasks, tags are not
passed to the included tasks. As a result, tags like neutron-config
do not have the intended effect. This patch changes include_tasks
to import_tasks for all cases where dynamic vars or loops are not used
so that tags are properly handled.

Reference -
https://docs.ansible.com/ansible/latest/user_guide/playbooks_reuse.html
https://bugs.launchpad.net/openstack-ansible/+bug/1815043

Change-Id: I7e529e9b4d23ffe8658c4dcdf4e98989d0f84f3f

tasks/main.yml

@@ -74,15 +74,15 @@
     - common-mq
     - mistral-config
 
-- include_tasks: mistral_install.yml
+- import_tasks: mistral_install.yml
   tags:
     - mistral-install
 
-- include_tasks: mistral_post_install.yml
+- import_tasks: mistral_post_install.yml
   tags:
     - mistral-config
 
-- include_tasks: mistral_db_sync.yml
+- import_tasks: mistral_db_sync.yml
   when:
     - "mistral_services['mistral-api']['group'] in group_names"
     - "inventory_hostname == ((groups[mistral_services['mistral-api']['group']]| intersect(ansible_play_hosts)) | list)[0]"
@@ -90,7 +90,7 @@
     - mistral-config
 
 - name: Run the systemd service role
-  include_role:
+  import_role:
     name: systemd_service
   vars:
     systemd_user_name: "{{ mistral_system_user_name }}"
@@ -122,7 +122,7 @@
     - mistral-config
     - systemd-service
 
-- include_tasks: mistral_service_setup.yml
+- import_tasks: mistral_service_setup.yml
   when:
     - "mistral_services['mistral-api']['group'] in group_names"
     - "inventory_hostname == ((groups[mistral_services['mistral-api']['group']]| intersect(ansible_play_hosts)) | list)[0]"