Cue has been retired in mid 2016 as official project and did not
continue developement, it's time to retire it completely.
Remove everything, update README.
Depends-On: https://review.openstack.org/551202
Change-Id: I1f4a71fbea8a90303036ad0adaec95fa15b6522f
Checkin gates are failing (both coverage and integration/tempest)
Handling the case where testr fails by exiting and returning the
exit status. Newest 'coverage' package does not support 'ignore-errors'
in config section '[report]'.
Also updating devstack plugins/scripts to use updated keystone v3
compatible commands (openstack vs nova)
Change-Id: I06d4e1179f115220608bcb15bbcfccc96769e11e