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-directed-graph/appc-dgraph/provider/pom.xml b/appc-directed-graph/appc-dgraph/provider/pom.xml
index 5acbb5a..a1a40bc 100644
--- a/appc-directed-graph/appc-dgraph/provider/pom.xml
+++ b/appc-directed-graph/appc-dgraph/provider/pom.xml
@@ -25,7 +25,7 @@
     <parent>
         <groupId>org.onap.appc</groupId>
         <artifactId>appc-dgraph</artifactId>
-        <version>1.5.0-SNAPSHOT</version>
+        <version>1.6.0-SNAPSHOT</version>
     </parent>
     <artifactId>appc-dg-provider</artifactId>
     <name>APPC DG - Provider</name>