Fix keystone image building issue
Fix keystone image building issue

wsgi.py file is remove in O. should move to keystone-wsgi-admin and
keystone-wsgi-public script.

TrivialFix

Change-Id: If86c407fd208adc5be6df54ac05dc39ee1cf757e

nihilifer/kolla,dardelean/kolla-ansible,coolsvap/kolla,dardelean/kolla-ansible,mrangana/kolla,stackforge/kolla,openstack/kolla,GalenMa/kolla,coolsvap/kolla,nihilifer/kolla,rahulunair/kolla,stackforge/kolla,intel-onp/kolla,stackforge/kolla,rahulunair/kolla,coolsvap/kolla,openstack/kolla,dardelean/kolla-ansible,mrangana/kolla,GalenMa/kolla,intel-onp/kolla