Cleanup in tools/packaging/openstack/centos_64/.
Removed grizzly specific targets and their packaging directories.
These packages are used from stock in havana and icehouse.
    cinder, keystone, glance, quantum, django-openstack-auth

Cleanuped Makefile to avoid too many ifdefs.
removed commented out packges from havana's contrail_packages.cfg

Change-Id: I8e53f84b84707506411dfa0690b3da775893d8f2
Merge "Cleanup in tools/packaging/openstack/centos_64/. Removed grizzly specific targets and their packaging directories. These packages are used from stock in havana and icehouse.     cinder, keystone, glance, quantum, django-openstack-auth"