Add openstack-swift to stein-py3-uc
Add openstack-swift to stein-py3-uc

Although swift does not support python3 yet, let's build it
for python2 in stein fedora builder so that we can test it
and run jobs which require swift in that builder.

Change-Id: I7fd0370d0a54ccaa6c0e141d8e331491773c8afe

javierpena/rdoinfo,redhat-openstack/rdoinfo