Change keystone.log's permit to keystone:keystone
Change keystone.log's permit to keystone:keystone

At present, keystone.log's user:group permit is root:kolla,
when got token from keystone, it failed. The reason is that:
Permission denied. So it shoud be changed keystone:keystone.

Change-Id: Ibbbf1d88ba16e5040f9068ea9948373d10593514
Closes-Bug: #1631685

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