[ONOS-4127] Backup metric service to ganglia monitoring server

- Initial implementation of metric service reporter
- Unit test for metric service reporter
- Bump up metric lib from 3.1.0 to 3.1.2

Change-Id: Ia178df759d671dfc15cffaacb09d5279ad3d9ad8
diff --git a/utils/misc/pom.xml b/utils/misc/pom.xml
index 25c404b..28573b5 100644
--- a/utils/misc/pom.xml
+++ b/utils/misc/pom.xml
@@ -31,6 +31,10 @@
 
     <description>Miscellaneous ON.Lab utilities</description>
 
+    <properties>
+        <metrics.version>3.1.2</metrics.version>
+    </properties>
+
     <dependencies>
         <dependency>
             <groupId>com.google.guava</groupId>
@@ -71,12 +75,12 @@
         <dependency>
             <groupId>io.dropwizard.metrics</groupId>
             <artifactId>metrics-core</artifactId>
-            <version>3.1.0</version>
+            <version>${metrics.version}</version>
         </dependency>
         <dependency>
             <groupId>io.dropwizard.metrics</groupId>
             <artifactId>metrics-json</artifactId>
-            <version>3.1.0</version>
+            <version>${metrics.version}</version>
         </dependency>
         <dependency>
             <groupId>org.apache.felix</groupId>