SAMZA-2586: Update samza-hello-samza#latest to use 1.6.0-SNAPSHOT (#82)

Issues: 1.5.0-SNAPSHOT is used in latest branch, which does not work with the instruction http://samza.apache.org/startup/hello-samza/latest/
Changes: Update to use 1.6.0-SNAPSHOT
Tests: Deployed a job following instructions on http://samza.apache.org/startup/hello-samza/latest/
diff --git a/gradle.properties b/gradle.properties
index 6ea16b0..ed6b46b 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -17,7 +17,7 @@
  * under the License.
  */
 
-SAMZA_VERSION=1.5.0-SNAPSHOT
+SAMZA_VERSION=1.6.0-SNAPSHOT
 KAFKA_VERSION=0.11.0.2
 HADOOP_VERSION=2.7.1
 
diff --git a/pom.xml b/pom.xml
index f81c998..f7a0d27 100644
--- a/pom.xml
+++ b/pom.xml
@@ -27,7 +27,7 @@
 
   <groupId>org.apache.samza</groupId>
   <artifactId>hello-samza</artifactId>
-  <version>1.5.0-SNAPSHOT</version>
+  <version>1.6.0-SNAPSHOT</version>
   <packaging>jar</packaging>
   <name>Samza Example</name>
   <description>
@@ -294,7 +294,7 @@
   <properties>
     <!-- maven specific properties -->
     <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
-    <samza.version>1.5.0-SNAPSHOT</samza.version>
+    <samza.version>1.6.0-SNAPSHOT</samza.version>
     <hadoop.version>2.6.1</hadoop.version>
   </properties>