Adds delete-orphan to database deletion.

Change-Id: I3570c812c042365e68eef3b5463899afa85eb9fd
Fixes: bug #1096549
Pin SQLAlchemy to 0.7.x

0.7.10 has been released and is compatible with 0.7.x. Instead
of pinning to 0.7.9, simply pin to 0.7.x to avoid SQLAlchemy 0.8

Unfortuantely '<0.8' matches '0.8.0b2', which is what we don't want.
Therefore pinning it to '<=0.7.99' instead.

This matches a corresponding change in openstack/requirements

Fixes: Bug #1153983

Change-Id: Icf680a933c6092cce52706fd9616a0d208164d1e
Merge "Pin SQLAlchemy to 0.7.x"
Imported Translations from Transifex

Change-Id: I45176c72238699536fe8cab84ca5f74cd0be65ec
Imported Translations from Transifex

Change-Id: Ifd288e967c4d23010336823765e6c6b95d43f732
Synchronize QuantumManager.get_instance() method

fixes bug 1155667

Change-Id: Ib6316b332fbd08c5b39e9820e5dc45f1846817cd
Imported Translations from Transifex

Change-Id: I2dd89260a302227b422c87261298632035576af8
Merge "Adds delete-orphan to database deletion."
Merge "Synchronize QuantumManager.get_instance() method"