xenapi - rename quantum to neutron
xenapi - rename quantum to neutron

Some changes were missing from the previous rename patch, so it broke
XenServer support. This patch contains the missing adjustments.

related to blueprint remove-use-of-quantum

Change-Id: I1ee5cc38d555bd5c26edf00a456ec71919604d79

openstack/neutron-vpnaas,citrix-openstack-build/neutron-fwaas,dougwig/x-neutron-fwaas,citrix-openstack-build/neutron-vpnaas,dougwig/x-neutron-vpnaas,openstack/neutron-vpnaas,openstack/neutron-fwaas,gaolichuang/neutron-fwaas,openstack/neutron-fwaas,gaolichuang/neutron-fwaas