Update translation setup for cli-reference

The propose_translation_update_manual job did not work since
we needed to initialize some files for it first. I expect that this
fixes the job.

I updates the transifex config to know about cli-refernece and creates
the pot file.

Related-Bug: #1275599
Change-Id: Ib6544fa7545722d61115224a1bb0e51b7ce7c272