In order to allow tests to work as the use of the common role is implemented in the various roles, we pre-implement the addition of the role into the a-r-r file. Change-Id: Ib3470ea86d3b6f037fe2aaa4476753a017c7ef12 Implements: blueprint python-build-install-simplification Signed-off-by: Jesse Pretorius <jesse.pretorius@rackspace.co.uk>