Comment 10 for bug 1461024

Reviewed: https://review.openstack.org/197444
Committed: https://git.openstack.org/cgit/openstack/neutron/commit/?id=02928766fc04f3cdf32de4b0c2856f872ef2d278
Submitter: Jenkins
Branch: stable/kilo

commit 02928766fc04f3cdf32de4b0c2856f872ef2d278
Author: Oleg Bondarev <email address hidden>
Date: Tue Jun 2 16:14:40 2015 +0300

    Fix callback registry notification for security group rule

    Some housekeeping was done in
     - SecurityGroupDbMixin:
       - create_rule_bulk() calls to create_rule();
       - registry notification is in create_rule();
       - separate validation for a single rule and for a group of rules
     - SecurityGroupServerRpcMixin:
       - overriden methods call to corresponding super class methods;

    Hopefully code is now self-documented enough

    Closes-Bug: #1461024
    (cherry picked from commit 76b4803530c0d5f47659aa519585178cc33cba46)

    Conflicts:
     neutron/db/securitygroups_db.py

    Change-Id: Ia75d7e206716bbe74aae89e4cebd0c2c40af68a8