Updates gettextutils module from oslo-incubator

Change-Id: Iea28f70cfe2631e67d9320172a5011de34616f63
Related-Bug: #1290849
Updates test module from oslo-incubator

Change-Id: Ifd98fa0efd4a64a20813ee4896f23270523f15b4
Related-Bug: #1290849