remove keystone-signing dir creation

The keystone middleware generates this directory automatically,
there is no need to pregenerating it (with potentially inconsistent
permissions).

Change-Id: I3858532307f9878691e55541bb43084677f5be68
Update selinux policies for mysqld

mysqld fails to startup when selinux is in enforcing mode. This is
because the data and logs were moved under /mnt/state and the selinux
policies were not updated to allow mysql access to the new locations.

Change-Id: I5ccf1078ad0edc066bab430580886ed6c253e153
Merge "remove keystone-signing dir creation"
Merge "Update selinux policies for mysqld"