Add uuidutils to oslo.utils

Oslo team was vacillating about moving uuidutils to
oslo.utils in the past. The consensus now is that it
may be still handy and has too many references for us
to fix (change references from uuidutils to use uuid.*
package directly)

Co-Authored-By: Victor Sergeyev <vsergeyev@mirantis.com>

Change-Id: I1b2e430915125da6cf505a8525c148898e8ec08a
Merge "Add uuidutils to oslo.utils"