Pin ansible-collections-openstack

The latest ansible-collections-openstack version is no longer
compatible with openstacksdk in stable/wallaby (0.55.1).

This pins the collection to avoid pulling "too new" version.

Closes-Bug: #2028472
Change-Id: Iee2ebe5fab92fa6865c39a09d59f769f80ff7b9b

tripleo_ansible/ansible-collections-requirements.yml

@@ -2,6 +2,7 @@
 collections:
   - name: https://opendev.org/openstack/ansible-collections-openstack.git
     type: git
+    version: 1.9.1
   - containers.podman
   - community.general
   - ansible.posix

tripleo_ansible/requirements.yml

@@ -35,9 +35,10 @@ roles:
     trackbranch: master
 
 collections:
-  - ansible.netcommon
-  - ansible.posix
-  - community.general
-  - openstack.cloud
-  - containers.podman
-  - community.crypto
+  - name: ansible.netcommon
+  - name: ansible.posix
+  - name: community.general
+  - name: openstack.cloud
+    version: 1.9.1
+  - name: containers.podman
+  - name: community.crypto