Bumping pom versions to 1.7.0-rc2 and fixing some maven issues

Change-Id: I6169420328333d0916452aa92efbfa961d72e9c4
diff --git a/apps/test/messaging-perf/pom.xml b/apps/test/messaging-perf/pom.xml
index 53498fd..fc2708e 100644
--- a/apps/test/messaging-perf/pom.xml
+++ b/apps/test/messaging-perf/pom.xml
@@ -22,7 +22,7 @@
     <parent>
         <groupId>org.onosproject</groupId>
         <artifactId>onos-apps-test</artifactId>
-        <version>1.7.0-SNAPSHOT</version>
+        <version>1.7.0-rc2</version>
     </parent>
 
     <artifactId>onos-app-messaging-perf</artifactId>