Add coverage for gluster.swift module (PkgInfo).

Change-Id: I614efb853989ab455721bbf28309cec746343f50
Signed-off-by: Peter Portante <peter.portante@redhat.com>
Reviewed-on: http://review.gluster.org/5081
Reviewed-by: Luis Pabon <lpabon@redhat.com>
Tested-by: Luis Pabon <lpabon@redhat.com>