Cleanup: Remove obsolete Fuel@OPNFV patches

Cleanup: Remove obsolete Fuel@OPNFV patches

Since we are now building inside docker containers, it is no longer
necessary to use `python-debian` from pip repo instead of Ubuntu.

Also drop repeating the repo mirror build in case of failure.

NOTE: This cherry-pick DOES NOT remove Ubuntu mirror blacklists,
as it does on armband/master, since Fuel@OPNFV/stable/colorado
still uses the old mirror selection mechanism.

Change-Id: I62890b6ae7977cd8a39c06ce17c8964e6cb1dddb
Signed-off-by: Alexandru Avadanii <Alexandru.Avadanii@enea.com>