Upgrade Spark to 1.6.1
diff --git a/pom.xml b/pom.xml
index a423403..0918961 100644
--- a/pom.xml
+++ b/pom.xml
@@ -168,7 +168,7 @@
       <dependency>
         <groupId>org.apache.spark</groupId>
         <artifactId>spark-core_2.10</artifactId>
-        <version>1.5.1</version>
+        <version>1.6.1</version>
       </dependency>
       <dependency>
         <groupId>org.apache.thrift</groupId>