Add hadoop-2.5 profile with upgraded jets3t

This contribution is my original work and I license the work to the project under the project's open source license.

Adding support for hadoop-2.5.

Also bumped the jets3t version because there are conflicts with the java-aws-sdk under version 0.9.0. 

JIRA: https://issues.apache.org/jira/browse/SPARK-4807