Added 'oozie' service support to IDH plugin

1. Enabled oozie service in IDH
2. Added ability to modify any config oozie understands
3. Savanna will download and unpack ext2.2 to make Oozie UI work
4. Added soft links on hadoop libraries. They are needed by oozie.

Implements blueprint idh-oozie
Implements blueprint idh-edp

Change-Id: I34e032f81888fcdef358620ef075e5ea294f466f
Merge "Added 'oozie' service support to IDH plugin"