Fixed qos devstack service name (should be q-qos) for -plus gate hook
Fixed qos devstack service name (should be q-qos) for -plus gate hook

This hook was introduced for experimental -plus job and is supposed to
enable advanced features like qos. Sadly, the service name was not
correct, so the service was not enabled.

The patch that introduced the hook:
I9f73b938539586022aeb22e3a32877816e1dcaba

Change-Id: I1c2e758341825d031a473d837e9a2e707e5ce5f3

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