Derive container name from source hostname
Derive container name from source hostname

- Create container in the target machine with "container_<hostname>" name;
- Create export dir with same name when using virt_tar_out

pcahyna/leapp-to-prototype,GAZDOWN/prototype,mfranczy/prototype,vinzenz/prototype,ncoghlan/prototype,GAZDOWN/prototype,pcahyna/leapp-to-prototype,GAZDOWN/prototype,mfranczy/prototype,vmindru/prototype,GAZDOWN/leapp,vinzenz/prototype,pcahyna/leapp-to-prototype,leapp-to/prototype,GAZDOWN/leapp,mfranczy/prototype,GAZDOWN/prototype,vmindru/prototype,vmindru/prototype,ncoghlan/prototype,vinzenz/prototype,ncoghlan/prototype,leapp-to/prototype,vmindru/prototype,mfranczy/prototype,leapp-to/prototype,leapp-to/prototype,pcahyna/leapp-to-prototype,ncoghlan/prototype,vinzenz/prototype