Bump version of apache commons-math3

Version 3.1.1 is two years old and the newer version includes
approximate percentile statistics (among other things).

Author: punya

pom.xml

@@ -147,7 +147,7 @@
     <aws.java.sdk.version>1.8.3</aws.java.sdk.version>
     <aws.kinesis.client.version>1.1.0</aws.kinesis.client.version>
     <commons.httpclient.version>4.2.6</commons.httpclient.version>
-    <commons.math3.version>3.1.1</commons.math3.version>
+    <commons.math3.version>3.4.1</commons.math3.version>
     <test_classpath_file>${project.build.directory}/spark-test-classpath.txt</test_classpath_file>
     <scala.version>2.10.4</scala.version>
     <scala.binary.version>2.10</scala.binary.version>