DVR:Remove unwanted check in _get_dvr_service_port_hostid
DVR:Remove unwanted check in _get_dvr_service_port_hostid

There is a check in _get_dvr_service_port_hostid to verify
if the port belongs to dvr service port or an agent gateway
port.

There is no need to check for the agent gateway port host.
This might be a left over from the previous cycle cleanup.

This patch removes the unwanted check.

Change-Id: I2571ec3453c2a5cc95c17b9c65de482e7e0ce9e5

eayunstack/neutron,openstack/neutron,huntxu/neutron,sebrandon1/neutron,cloudbase/neutron,wolverineav/neutron,openstack/neutron,mahak/neutron,igor-toga/local-snat,bigswitch/neutron,noironetworks/neutron,bigswitch/neutron,sebrandon1/neutron,mahak/neutron,MaximNevrov/neutron,noironetworks/neutron,MaximNevrov/neutron,huntxu/neutron,klmitch/neutron,eayunstack/neutron,wolverineav/neutron,openstack/neutron,cloudbase/neutron,klmitch/neutron,igor-toga/local-snat,mahak/neutron