re-commit

Added two more fixes:
1. added check for number of OSD configured v/s actually configured
2. added dependency for configuring openstack before configuring
	live migration

Fixes for supporting NFS-Live-Migration
1. added script for openstack node.
2. script for compute node
3. added openstack-get-config to query config of a parameter

Change-Id: I4f819993f6c18beb5a180c040c99573ce771af79