Added -source 1.6 to pom.xml
Added -source 1.6 to pom.xml

Our code requires 1.6+.
Hadoop requires 1.6+ too.

Fixes bug #1234702

Change-Id: I9ea97c9a7d98c9a1863613d863552843ea804275

openstack/sahara-extra,openstack/sahara-extra,openstack/sahara-extra,openstack/sahara-extra