Tagging 1.6.0-rc5

Change-Id: I040e22e1ad322b8f6de8c19665d7706831f92ea0
diff --git a/apps/optical/pom.xml b/apps/optical/pom.xml
index 7615168..0f2f8b1 100644
--- a/apps/optical/pom.xml
+++ b/apps/optical/pom.xml
@@ -22,7 +22,7 @@
     <parent>
         <groupId>org.onosproject</groupId>
         <artifactId>onos-apps</artifactId>
-        <version>1.6.0-SNAPSHOT</version>
+        <version>1.6.0-rc5</version>
     </parent>
 
     <artifactId>onos-app-optical</artifactId>