Updating version to 1.7.0-rc3 for the RC

Change-Id: Id6255010c0edb17eae24c2ed5aabb02cdfa7a33a
diff --git a/apps/graphitemetrics/pom.xml b/apps/graphitemetrics/pom.xml
index d5b9ae1..c28f4f5 100644
--- a/apps/graphitemetrics/pom.xml
+++ b/apps/graphitemetrics/pom.xml
@@ -22,7 +22,7 @@
     <parent>
         <groupId>org.onosproject</groupId>
         <artifactId>onos-apps</artifactId>
-        <version>1.7.0-SNAPSHOT</version>
+        <version>1.7.0-rc3</version>
     </parent>
 
     <artifactId>onos-app-graphite</artifactId>