Updated openstack/openstack
Project: openstack/neutron  0513c96ab60cf3e5e7ef6d85f4e87a768292b80a
null
Ml2: Set correct nullable for admin_state_up

In migrations 492a106273f8_brocade_ml2_mech_dri was set incorrect
nullable parameter:

Set admin_state_up NOT NULL in ml2_brocadeports.

Partial-Bug: #1296282

Change-Id: I051e37990ae3371978eeb1ff71e70ae2a44097bc