Pin diskimage-builder to last tag before refactor
Pin diskimage-builder to last tag before refactor

DIB has been under major refactor which will be version 2.0.
I think stable releases should not get this kind of changes
post-GA so we should keep in the last commit before refactor
which is tagged 1.28.0.

Change-Id: I09de3fb063e38a7c903a7dd38114d4873fbdc643

javierpena/rdoinfo,redhat-openstack/rdoinfo