Return version info on version controller
Return version info on version controller

Just like the global root controller "/" returns info for
all versions, with this change the version root controller
"/<version>" will return info about the selected version.

The patch also ensures the root version controller only
accepts GET requests.

Change-Id: I183c6ff67597fe93e394fc8f07d7229112d4e215

JianyuWang/neutron,wolverineav/neutron,noironetworks/neutron,yanheven/neutron,igor-toga/local-snat,SamYaple/neutron,jumpojoy/neutron,klmitch/neutron,dims/neutron,cloudbase/neutron,mahak/neutron,eayunstack/neutron,apporc/neutron,sebrandon1/neutron,yanheven/neutron,bigswitch/neutron,asgard-lab/neutron,huntxu/neutron,MaximNevrov/neutron,chitr/neutron,dhanunjaya/neutron,openstack/neutron,glove747/liberty-neutron,cloudbase/neutron,igor-toga/local-snat,jumpojoy/neutron,eayunstack/neutron,klmitch/neutron,apporc/neutron,dims/neutron,mahak/neutron,noironetworks/neutron,dhanunjaya/neutron,openstack/neutron,bigswitch/neutron,swdream/neutron,MaximNevrov/neutron,openstack/neutron,asgard-lab/neutron,chitr/neutron,wolverineav/neutron,glove747/liberty-neutron,sebrandon1/neutron,mahak/neutron,huntxu/neutron,swdream/neutron,SamYaple/neutron,JianyuWang/neutron