Added filter for DLQs

Added a new filter to handle DLQs settings.

In this case, we lowercase the app name because ES does not allow
indices to be created with uppercase chars

manifest/operations/pipelines/cf-apps-es.yml

@@ -563,6 +563,16 @@
               }
           }
           
+        filter-60-dlq: |
+          ##------------------------------
+          ## Handles Dead Letter Queues filters
+          ##------------------------------
+          
+          filter {
+          	mutate {
+          		lowercase => ["[@cf][app]"]
+          		}
+          }
         filter-90-set_syslog_level: |
           ##-------------------
           # define syslog level

manifest/operations/pipelines/cf-apps-es/filter-60-dlq.conf

@@ -0,0 +1,9 @@
+##------------------------------
+## Handles Dead Letter Queues filters	 
+##------------------------------
+
+filter {
+	mutate {
+		lowercase => ["[@cf][app]"]
+		}
+}