NeutronCommand requires subclass unnecessary log = logging.getLogger lines

[Isaku Yamahata]

    It is a common pattern to add
    class XXXCommand(NeutronCommand):
        log = logging.getLogger(__name__ + '.<command name>').

But the logger name can be determined automatically, so it caused unnecessary code template.
They can be eliminated

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/59310
Committed: https://git.openstack.org/cgit/openstack/python-neutronclient/commit/?id=4164de2bdb48eaacc58a70790aadb21b78cbf723
Submitter: Jenkins
Branch: master

commit 4164de2bdb48eaacc58a70790aadb21b78cbf723
Author: Isaku Yamahata <email address hidden>
Date: Tue Nov 26 16:01:29 2013 +0900

    setup logger name of NeutronCommand automatically

    It is a common pattern to add
    class XXXCommand(NeutronCommand):
        log = logging.getLogger(__name__ + '.<command name>').
    So introduce a metaclass to do that automatically in order to simplify
    the code a bit.

    Closes-Bug: #1258028
    Change-Id: I7908e3e2c0f3f04d9e57360f6ba22e153d0d35bd