Using latest atomix and copycat versions

Change-Id: Ie9bb91e578280e2786d4a212dfea3ebf63e9451c
diff --git a/pom.xml b/pom.xml
index 4d82115..24115b8 100644
--- a/pom.xml
+++ b/pom.xml
@@ -79,6 +79,7 @@
         <netty4.version>4.0.33.Final</netty4.version>
         <!-- TODO: replace with final release version when it is out -->
         <atomix.version>1.0.0-rc3</atomix.version>
+        <atomix.copycat.version>1.0.0-rc6</atomix.copycat.version>
         <copycat.version>0.5.1.onos</copycat.version>
         <openflowj.version>0.9.2.onos</openflowj.version>
         <onos-maven-plugin.version>1.9</onos-maven-plugin.version>