Increment snapshot version

Change from 1.5.0-SNAPSHOT to 1.6.0-SNAPSHOT to prepare
for next development cycle.

Change-Id: I187785ab4b11a37815289d20ba802c48e86cee7f
Signed-off-by: Patrick Brady <patrick.brady@att.com>
Issue-ID: APPC-1585
diff --git a/appc-dg/appc-dg-shared/appc-dg-domain-model-lib/pom.xml b/appc-dg/appc-dg-shared/appc-dg-domain-model-lib/pom.xml
index 785423a..bb1448d 100644
--- a/appc-dg/appc-dg-shared/appc-dg-domain-model-lib/pom.xml
+++ b/appc-dg/appc-dg-shared/appc-dg-domain-model-lib/pom.xml
@@ -53,5 +53,5 @@
             <scope>test</scope>
     </dependency>
   </dependencies>
-  <version>1.5.0-SNAPSHOT</version>
+  <version>1.6.0-SNAPSHOT</version>
 </project>