release_tool.py: Add missing MENDER_QA_REV build parameter.
release_tool.py: Add missing MENDER_QA_REV build parameter.

Changelog: None
Signed-off-by: Kristian Amlie <505e66ae45028a0596c853559221f0b72c1cee21@mender.io>
(cherry picked from commit 07f7627958eaee895ccab738e3e150cf764380af)

GregorioDiStefano/integration,GregorioDiStefano/integration,pasinskim/integration,pasinskim/integration,pasinskim/integration