Move factory assignment in _ipam_allocate_ips()
Move factory assignment in _ipam_allocate_ips()

It was inside a for loop, but should be outside since it's
a static assignment.

Trivialfix

Change-Id: I6385ec91b9df3c53175c5be17857a0402d7c4f4e

mahak/neutron,openstack/neutron,openstack/neutron,openstack/neutron,mahak/neutron,mahak/neutron