Remove global DB_ENGINE from Neutron

Related-Bug 1207402

This global is not used anymore as it's been replaced by a similar
global variable in neutron/openstack/common/db/sqlalchemy/session.py

Change-Id: Id4614069af490020d18f14011853787930076e0a
Fix ML2 VXLAN TypeDriver DB migration

The migration for the ML2 VXLAN TypeDriver was incorrectly setting
primary key attributes on separate lines for 'ip_address' and
'udp_port'. Also, a primary key cannot have autoincrement set, so
add this to 'udp_port' as well.

Fixes bug 1213134

Change-Id: I0b2e2685bf524dd9c0333ac4511287ad6a5eb87e
Update mailmap

Update mailmap and keep this file
in alphabetical order.

Change-Id: I657b83202de3fdf6f4624567dfa8a53ca3ea5b39
Merge "Fix ML2 VXLAN TypeDriver DB migration"
Imported Translations from Transifex

Change-Id: Ie1d6b2c1f158609b9bb58aedec542060ce2cd2e7
Merge "Remove global DB_ENGINE from Neutron"
Merge "Update mailmap"
Merge "Imported Translations from Transifex"