Use config_template as a collection

Since we still use ceph-ansible that has their own implementation of
config_template module it's worth to use mentioned module as a collection
explicitly.

Depends-On: https://review.opendev.org/c/openstack/openstack-ansible/+/819814



Change-Id: I196d4b2e26f803afbd917af729be4183884c7eea

tasks/tacker_post_install.yml

@@ -16,7 +16,7 @@
 # limitations under the License.
 
 - name: Drop tacker Config(s)
-  config_template:
+  openstack.config_template.config_template:
     src: "{{ item.src }}"
     dest: "{{ item.dest }}"
     owner: "{{ tacker_system_user_name }}"
@@ -41,7 +41,7 @@
     - Restart tacker services
 
 - name: Implement policy.yaml if there are overrides configured
-  config_template:
+  openstack.config_template.config_template:
     content: "{{ tacker_policy_overrides }}"
     dest: "{{ tacker_etc_dir }}/policy.yaml"
     owner: "{{ tacker_system_user_name }}"