Give the qos extension a friendly name.
Give the qos extension a friendly name.

Most API extensions have a friendly name vs the more concise alias
used in code and configuration.  Give the 'qos' API extension a
friendly name of "Quality of Service".

APIImpact
Change-Id: I209af31af0311776ef363a380a6f060c86b28982
Signed-off-by: Russell Bryant <b61ba72562ef1f6718e4f653428a87ed07b576b8@redhat.com>

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