Updated openstack/openstack
Project: openstack/nova  54f6fbd2c11b31215c7c0e02277665b452471f6e

Optimize 'fixed_ip_bulk_create' function

1) All single 'insert' operations were changed by
single 'multiline insert' operation

2) Explicit flush() was removed

3) Using code from oslo.db provides
getting error value from DBDuplicateEntry exception

Change-Id: Ib3d99b950bcf5e97ac5d6099d5ccfbe98906b339