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

Change-Id: I6169420328333d0916452aa92efbfa961d72e9c4
diff --git a/providers/bgpcep/pom.xml b/providers/bgpcep/pom.xml
index 231c8df..987c3d1 100644
--- a/providers/bgpcep/pom.xml
+++ b/providers/bgpcep/pom.xml
@@ -18,7 +18,7 @@
   <parent>
     <groupId>org.onosproject</groupId>
     <artifactId>onos-providers</artifactId>
-    <version>1.7.0-SNAPSHOT</version>
+    <version>1.7.0-rc2</version>
   </parent>
 
   <artifactId>onos-bgpcep-providers</artifactId>