Add Python 3.5 classifier
Add Python 3.5 classifier

Since the Python 3.5 gate job builds cleanly now, we should claim
support for Python 3.5 in the metadata's classifier.

Change-Id: I215313560d6bb3501093c95870c12cde1f11b5a5

mahak/keystone,ilay09/keystone,rajalokan/keystone,rajalokan/keystone,ilay09/keystone,mahak/keystone,rajalokan/keystone,openstack/keystone,ilay09/keystone,openstack/keystone,cernops/keystone,openstack/keystone,cernops/keystone,mahak/keystone