Increment snapshot version

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

Change-Id: Ia712804206c3c72cf661358c1a331a9dc6cb96be
Signed-off-by: Patrick Brady <patrick.brady@att.com>
Issue-ID: APPC-1585
diff --git a/version.properties b/version.properties
index 0c2ba15..45e6ecd 100644
--- a/version.properties
+++ b/version.properties
@@ -25,7 +25,7 @@
 # because they are used in Jenkins, whose plug-in doesn't support
 
 release_name=1
-sprint_number=5
+sprint_number=6
 feature_revision=0
 
 base_version=${release_name}.${sprint_number}.${feature_revision}