update comment for dropping support
update comment for dropping support

it's apparently too late to make this change in Pike rc stage
so defer to Queens by changing the release version.

Change-Id: I006f41383dcef68d63a646665a56cbd4c3f93c4b

phenoxim/nova,mahak/nova,mahak/nova,klmitch/nova,klmitch/nova,phenoxim/nova,gooddata/openstack-nova,gooddata/openstack-nova,rahulunair/nova,rahulunair/nova,gooddata/openstack-nova,openstack/nova,gooddata/openstack-nova,openstack/nova,mikalstill/nova,rahulunair/nova,klmitch/nova,klmitch/nova,mahak/nova,mikalstill/nova,mikalstill/nova,openstack/nova