Use is_loaded in manager.init
Use is_loaded in manager.init

It's available since 1.1.0 (Ocata).

TrivialFix

Change-Id: I89a7fa0f9353d74717f6a57972294ab5e11157d2

huntxu/neutron,openstack/neutron,eayunstack/neutron,openstack/neutron,openstack/neutron,huntxu/neutron,noironetworks/neutron,mahak/neutron,eayunstack/neutron,mahak/neutron,mahak/neutron,noironetworks/neutron