Remove keystone reconfiguration in devstack script
Remove keystone reconfiguration in devstack script

Change-Id: I2179ec899816a528261b6af5cf2e07eb00fcd43d
Closes-bug: #1609295

stackforge/tacker,stackforge/tacker,zeinsteinz/tacker,openstack/tacker,openstack/tacker,zeinsteinz/tacker,openstack/tacker