Remove comments from requirements.txt (workaround pbr bug)

Workaround for pbr bug #1191923

Change-Id: I3ab1f5bde70fea3ac30323449b645aef46352f81
Fix branch in db migrations

Fixes bug 1207641

Change-Id: Ic980a2c04a084f1bcfce549422d27b8a384b08f5
Merge "Fix branch in db migrations"
Merge "Remove comments from requirements.txt (workaround pbr bug)"