Revert "Revert "Add enforce_scope setting support for keystone""

This reverts commit 26bd94b45efb63683072006e4281dd34a313d881.

Reason for revert: Devstack keystone creation/setup are moved to
scope tokens, so we can reintroduce the scope check enable.

Change-Id: I6e1c261196dbcaf632748fb6f04e0867648b76c7
2 files changed