Specify CDH version

In plugin.py we give "5" and "5.2.0" choices for users to
select. In deploy.py we will use this value as the fullVersion
parameter passed to create_cluster. We treate "5" as "5.0.0".
Now for there is no further operation difference between 5.0.0
and 5.2.0, we do not do other changes, and do not create
directories or use different classes implementations like for
vanilla.

Closes-Bug: #1397155

Change-Id: Ib064eaf60eef0bf338b9757e338ec61b80e6e812
Merge "Specify CDH version"