Make memcached logs verbosity configurable

This adds the MemcachedDebug flag which makes memcached logs verbose.
Also, the service now reacts to the global Debug flag.

Related-Bug: #1720183
Change-Id: Ie8120359a12f734aad584b083c8362dd21b70dea

puppet/services/memcached.yaml

@@ -39,6 +39,21 @@ parameters:
   MonitoringSubscriptionMemcached:
     default: 'overcloud-memcached'
     type: string
+  Debug:
+    default: false
+    description: Set to True to enable debugging on all services.
+    type: boolean
+  MemcachedDebug:
+    default: ''
+    description: Set to True to enable debugging Memcached service.
+    type: string
+
+conditions:
+  service_debug:
+    or:
+      - equals: [{get_param: MemcachedDebug}, 'true']
+      - equals: [{get_param: MemcachedDebug}, 'True']
+      - equals: [{get_param: Debug}, true]
 
 outputs:
   role_data:
@@ -54,7 +69,14 @@ outputs:
         # internal_api_subnet - > IP/CIDR
         memcached::listen_ip: {get_param: [ServiceNetMap, MemcachedNetwork]}
         memcached::max_memory: {get_param: MemcachedMaxMemory}
-        memcached::verbosity: 'v'
+        memcached::verbosity:
+          list_join:
+            - ''
+            - - 'v'
+              - if:
+                - service_debug
+                - 'v'
+                - ''
         tripleo.memcached.firewall_rules:
           '121 memcached':
             dport: 11211

releasenotes/notes/memcached-verbose-logs-84ca938d76c16429.yaml

@@ -0,0 +1,6 @@
+---
+features:
+  - |
+    The memcached service now reacts to the Debug flag, which will make its
+    logs verbose. Also, the MemcachedDebug flag was added, which will just add
+    this for the individual service.