allow no destination container name in `lxc move`
allow no destination container name in `lxc move`

Signed-off-by: Tycho Andersen <10c18fcb898ee6b17d6575d444b125d10b3f4d6a@canonical.com>

pcdummy/lxd,techtonik/lxd,smoser/lxd,stgraber/lxd,techtonik/lxd,ollie314/lxd,atxwebs/lxd,chrisglass/lxd,Malizor/lxd,jensg-st/lxd,jensg-st/lxd,ericsnowcurrently/lxd,tych0/lxd,beni55/lxd,Malizor/lxd,jensg-st/lxd,dustinkirkland/lxd,mjeanson/lxd,Skarlso/lxd,atxwebs/lxd,jsavikko/lxd,rrva/lxd,lxc/lxd,pcdummy/lxd,achanda/lxd,dustinkirkland/lxd,benaryorg/lxd,sl1pm4t/lxd,ericsnowcurrently/lxd,achanda/lxd,georghopp/lxd,stgraber/lxd,stgraber/lxd,stgraber/lxd,ollie314/lxd,mikemccracken/lxd,yura-pakhuchiy/lxd,jumpstarter-io/lxd,jumpstarter-io/lxd,dustinkirkland/lxd,akshaykarle/lxd,mjeanson/lxd,rcj4747/lxd,rrva/lxd,lxc/lxd,benaryorg/lxd,achanda/lxd,sl1pm4t/lxd,pcdummy/lxd,erikmack/lxd,yura-pakhuchiy/lxd,ericsnowcurrently/lxd,akshaykarle/lxd,rcj4747/lxd,chrisglass/lxd,tych0/lxd,hallyn/lxd,jumpstarter-io/lxd,benaryorg/lxd,dvbportal/osx-lxd,dvbportal/osx-lxd,jsavikko/lxd,smoser/lxd,rrva/lxd,hallyn/lxd,chrisglass/lxd,Skarlso/lxd,lxc/lxd,Skarlso/lxd,sl1pm4t/lxd,smoser/lxd,lxc/lxd,Malizor/lxd,stgraber/lxd,ollie314/lxd,jsavikko/lxd,hallyn/lxd,georghopp/lxd,lxc/lxd,mikemccracken/lxd,basvanbeek/lxd,beni55/lxd,tych0/lxd,erikmack/lxd,Skarlso/lxd,mjeanson/lxd,lxc/lxd,techtonik/lxd,mikemccracken/lxd,basvanbeek/lxd,atxwebs/lxd,stgraber/lxd,rcj4747/lxd,erikmack/lxd,hallyn/lxd,lxc/lxd,atxwebs/lxd,akshaykarle/lxd,basvanbeek/lxd,yura-pakhuchiy/lxd,georghopp/lxd,hallyn/lxd,dvbportal/osx-lxd,beni55/lxd,stgraber/lxd,hallyn/lxd