cinder.schedule: Replace 'locals()' with explicit values

Help bring source code into compliance with the Cinder Style Commandments:
https://github.com/openstack/cinder/blob/master/HACKING.rst

This change covers all affected source in the cinder scheduler module, i.e.
cinder/scheduler/*.py and subdirectories.

Partially fixes: bug #1190748

Change-Id: I75ad858ee62317bef6c59b9c0896f8a94a989d52
Merge "cinder.schedule: Replace 'locals()' with explicit values"