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
Bump stable/havana next version to 2013.2.3

Change-Id: Ia5b940faf01df6cae58df1f4b4f5e8fa2f3f078a
Fix incompatibilities in tests with keystoneclient 0.6

The patch removes usage of StubOutClassWithMocks with keystone Client
class, which doesn't work anymore now that there is an ABC in the MRO.

Closes-Bug: #1279907
(cherry picked from commit 26fe7a961f644e1c93a92c8a73b25d649137f7b9)

Conflicts:
	heat/tests/test_heatclient.py

Change-Id: I4e8ff2cde2723060faf9906ecf51b13911ac5f42
Merge "Bump stable/havana next version to 2013.2.3" into stable/havana
Merge "Don't raise MySQL 2013 'Lost connection' errors" into stable/havana
Fix "members" property check

According to https://bugs.launchpad.net/heat/+bug/1247638/comments/3

Closes-Bug: #1248571
Closes-Bug: #1247638
Change-Id: I4a61963d730250d8c3714b20c9cc7bb3717d85af
Raise the default max header to accommodate large tokens

PKI tokens hit the default limit if there is enough
services defined in the keystone catalog.

Also the v3 catalog is larger than the v2 catalog which would explain
why this bug is being hit just now.

This change adds the configuration option max_header_line to each of the
API confurations which has a default of 16384.

Closes-Bug: #1190149
Change-Id: I5da09aa08a1242c5e356bd8bf532baa9347ce075
(cherry picked from commit 0b02feb20d4485d0c6d486c5a72b814ce3bdf9e5)
Merge "Fix "members" property check" into stable/havana
Don't delete trust on backup stack delete

Since the trust_id is copied from the stack being backed-up, we
don't want to delete the trust when the backup is deleted, or
the actual stack will break when the next deferred auth operation
occurs.

Closes-Bug: #1271968
(cherry picked from commit 8ce9a177c47b3ee224200690d7181c784c418292)

Conflicts:

	heat/engine/parser.py

Change-Id: I578d4e373d425cc0452ae235637cc50bac455433