Add Hadoop 2 vanilla plugin

Features:
* deploy services: namenode, datanode, resourcemanager, nodemanager
* provisioning configs

Partially implements blueprint: vanilla-plugin-hadoop-2

Change-Id: I0c62050767e3c63bdfc9e1e0f3454abc4f070e26
Updated features comparision heat with direct engine

Change-Id: If2f5a26d583bc220e15a4971e041ef7382d9de42
Merge "Add Hadoop 2 vanilla plugin"
Merge "Updated features comparision heat with direct engine"