Comment 6 for bug 1275838

Reviewed: https://review.openstack.org/73314
Committed: https://git.openstack.org/cgit/openstack/heat/commit/?id=8bb7830a5068000ca265493a93883b90114ccde7
Submitter: Jenkins
Branch: stable/havana

commit 8bb7830a5068000ca265493a93883b90114ccde7
Author: Ian McLeod <email address hidden>
Date: Wed Feb 5 15:51:58 2014 -0600

    Don't raise MySQL 2013 'Lost connection' errors

    cherry pick, including original commit message below from
    oslo-incubator commit:

    b4f72b2987d53bb434e3a833f06d70a2167f5efc

    Closes bug: 1275838

    Although this code error is part of the `ping_listener` tests, it was
    missing from the list of known - and ignored - connection errors.

    The code error 2013 refers to a connection lost during a query, see:
    https://dev.mysql.com/doc/refman/5.0/en/error-messages-client.html#error_cr_server_lost

    Without this error code, the session won't try to reconnect to mysql,
    which makes `max_retries` useless.

    (cherry picked from commit 472c1440677440e0888570926b49542ddf260724)

    Conflicts:
     heat/openstack/common/db/sqlalchemy/session.py

    Change-Id: Id8a1c0665468b503b092c4f01ffd40e2be9c6fa9