Move to rhel8 PG10 container for persistent PG

Merge in updated liveness checks from upstream template

installer/roles/kubernetes/tasks/backup.yml

@@ -50,7 +50,7 @@
   shell: |
     {{ kubectl_or_oc }} -n {{ kubernetes_namespace }} exec ansible-tower-management -- \
       bash -c "PGPASSWORD={{ pg_password | quote }} \
-        scl enable rh-postgresql10 -- pg_dump --clean --create \
+        pg_dump --clean --create \
           --host='{{ pg_hostname | default('postgresql') }}' \
           --port={{ pg_port | default('5432') }} \
           --username='{{ pg_username }}' \

installer/roles/kubernetes/tasks/main.yml

@@ -145,7 +145,7 @@
       block:
         - name: Set new pg image
           shell: |
-            IMAGE=registry.access.redhat.com/rhscl/postgresql-10-rhel7
+            IMAGE=registry.redhat.io/rhel-8/postgresql-10
             {{ kubectl_or_oc }} -n {{ kubernetes_namespace }} set image dc/postgresql postgresql=$IMAGE
 
         - name: Wait for change to take affect

installer/roles/kubernetes/tasks/restore.yml

@@ -95,7 +95,7 @@
       shell: |
         {{ kubectl_or_oc }} -n {{ kubernetes_namespace }} \
           exec -i ansible-tower-management -- bash -c "PGPASSWORD={{ pg_password | quote }} \
-            scl enable rh-postgresql10 -- psql \
+            psql \
             --host={{ pg_hostname | default('postgresql') }} \
             --port={{ pg_port | default('5432') }} \
             --username={{ pg_username }} \