Add cliutils.args for task_id in use task command
Add cliutils.args for task_id in use task command

'rally use task --uuid [uuid]' is now also working in addition of
'rally use task [uuid]' which was working before this change.

Change-Id: Ie7f1e87dd7def02c9ac2c4c15d16ba341dce2ba2

vganapath/rally,vganapath/rally,eayunstack/rally,group-policy/rally,yeming233/rally,vponomaryov/rally,amit0701/rally,varunarya10/rally,openstack/rally,aforalee/RRally,go-bears/rally,pandeyop/rally,yeming233/rally,go-bears/rally,eonpatapon/rally,aplanas/rally,gluke77/rally,paboldin/rally,varunarya10/rally,gluke77/rally,aplanas/rally,redhat-openstack/rally,ytsarev/rally,pyKun/rally,group-policy/rally,openstack/rally,vefimova/rally,group-policy/rally,eayunstack/rally,eayunstack/rally,cernops/rally,vganapath/rally,cernops/rally,amit0701/rally,vefimova/rally,eonpatapon/rally,paboldin/rally,pyKun/rally,openstack/rally,vponomaryov/rally,vganapath/rally,paboldin/rally,amit0701/rally,afaheem88/rally,openstack/rally,pandeyop/rally,gluke77/rally,aforalee/RRally,afaheem88/rally,shdowofdeath/rally,redhat-openstack/rally,gluke77/rally,ytsarev/rally,shdowofdeath/rally