Nova: Fix missing cache backend

There is an issue with data composition and cache backend for nova is
currently not configured. This change fixes that.

Change-Id: I8269cdd79a114458f03c9bfc385f14ef1495d9c9
Closes-Bug: #1964272

deployment/nova/nova-base-puppet.yaml

@@ -252,11 +252,6 @@ outputs:
           nova::cinder::cross_az_attach: {get_param: NovaCrossAZAttach}
           nova::cache::enabled: {get_param: EnableCache}
           nova::cache::tls_enabled: {get_param: MemcachedTLS}
-          if:
-            - tls_cache_enabled
-            - nova::cache::backend: 'dogpile.cache.pymemcache'
-              nova::cache::enable_socket_keepalive: true
-            - nova::cache::backend: 'dogpile.cache.memcached'
           nova::rpc_response_timeout: {get_param: NovaRpcResponseTimeout}
           nova::upgrade_level_compute:
             if:
@@ -294,6 +289,11 @@ outputs:
                   key: 'os_compute_api:servers:show:host_status:unknown-only'
                   value: {get_param: NovaApiHostStatusPolicy}
               - {}
+        - if:
+            - tls_cache_enabled
+            - nova::cache::backend: 'dogpile.cache.pymemcache'
+              nova::cache::enable_socket_keepalive: true
+            - nova::cache::backend: 'dogpile.cache.memcached'
         - get_attr: [RoleParametersValue, value]
       service_config_settings:
         rabbitmq: