cinder.api: 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 api module, specifically:
    cinder/api/contrib/volume_actions.py

    Partially fixes: bug #1190758

Change-Id: I2134e69b70a5a5132847168f60b4d192bdf0b536
Merge "    cinder.api: Replace 'locals()' with explicit values"