Fix Swift config for Ceilometer usage

Ceilometer filter was previously removed from the Swift
configuration to avoid useless Ceilometer logs in the Swift
ones. This was fixed by setting only warning log level for
this Ceilometer part of the pipeline to keep only important
ones.

Change-Id: I8c41355bb98dbf3bb59ec792221b05ea936086b7
Partial-Bug: #1294789
diff --git a/lib/swift b/lib/swift
index c47b09f..7b55c98 100644
--- a/lib/swift
+++ b/lib/swift
@@ -337,12 +337,12 @@
     iniset ${SWIFT_CONFIG_PROXY_SERVER} app:proxy-server node_timeout 120
     iniset ${SWIFT_CONFIG_PROXY_SERVER} app:proxy-server conn_timeout 20
 
-    # Skipped due to bug 1294789
-    ## Configure Ceilometer
-    #if is_service_enabled ceilometer; then
-    #    iniset ${SWIFT_CONFIG_PROXY_SERVER} filter:ceilometer use "egg:ceilometer#swift"
-    #    SWIFT_EXTRAS_MIDDLEWARE_LAST="${SWIFT_EXTRAS_MIDDLEWARE_LAST} ceilometer"
-    #fi
+    # Configure Ceilometer
+    if is_service_enabled ceilometer; then
+        iniset ${SWIFT_CONFIG_PROXY_SERVER} filter:ceilometer "set log_level" "WARN"
+        iniset ${SWIFT_CONFIG_PROXY_SERVER} filter:ceilometer use "egg:ceilometer#swift"
+        SWIFT_EXTRAS_MIDDLEWARE_LAST="${SWIFT_EXTRAS_MIDDLEWARE_LAST} ceilometer"
+    fi
 
     # Restrict the length of auth tokens in the swift proxy-server logs.
     iniset ${SWIFT_CONFIG_PROXY_SERVER} filter:proxy-logging reveal_sensitive_prefix ${SWIFT_LOG_TOKEN_LENGTH}