We need gettext on the systems for the translations jobs, this should be part of the bindep setup. Since we invoke tox, add bindep and tox setup in pre-run. Also, some proposal jobs need pyyaml, so add python-yaml to bindep.txt - and use bindep for all proposal jobs. Change-Id: I3c0e4741e1c0186b78859841db1ca5c791d4806b