Rolling onos-maven-plugin to 1.7-SNAPSHOT and onos-build-conf to 1.2-SNAPSHOT

Change-Id: Iea3add6940bedf298ec65c0e59af70814e02d99e
diff --git a/tools/package/maven-plugin/pom.xml b/tools/package/maven-plugin/pom.xml
index a891f32..5a287d0 100644
--- a/tools/package/maven-plugin/pom.xml
+++ b/tools/package/maven-plugin/pom.xml
@@ -25,7 +25,7 @@
 
     <groupId>org.onosproject</groupId>
     <artifactId>onos-maven-plugin</artifactId>
-    <version>1.6</version>
+    <version>1.7-SNAPSHOT</version>
     <packaging>maven-plugin</packaging>
 
     <description>Maven plugin for packaging ONOS applications or generating