The pip_install role is depended on by a lot of other roles, and
therefore sometimes gets processed prior to the pip_lock_down
role resulting in the pip, setuptools and wheels packages being
installed from a source other than the repo server once the repo
server is available. This is not the intended behaviour - the
repo server should always be a the primary source once it's
available.
This patch ensures that the pip_lock_down role is applied before
all the other dependent roles to ensure that the expected
behaviour is followed.
Change-Id: I2173ecbee4f8d93a6c206ed944c721a996adfd86
75eaeba3f0