MNEMONIC-266: Upgrade Spark artifacts to v2.1.1

Author: Wang, Gang(Gary)

mnemonic-spark/pom.xml

@@ -35,7 +35,7 @@
   <url>http://mnemonic.incubator.apache.org</url>
 
   <properties>
-    <spark.version>2.1.0</spark.version>
+    <spark.version>2.1.1</spark.version>
     <scala.version>2.11.8</scala.version>
     <scala.binary.version>2.11</scala.binary.version>
     <scalatest.version>3.0.1</scalatest.version>