Fix Devicemapper output parsing
Fix Devicemapper output parsing

shilpamayanna/cadvisor,BrickXu/cadvisor,IFTTT/cadvisor,jhjeong-kr/cadvisor,pwittrock/cadvisor,normanjoyner/cadvisor,dchen1107/cadvisor,derekwaynecarr/cadvisor,derekwaynecarr/cadvisor,f0/cadvisor,datawisesystems/cadvisor,carmark/cadvisor,derekwaynecarr/cadvisor,feiskyer/cadvisor,dchen1107/cadvisor,guoshimin/cadvisor,IFTTT/cadvisor,dchen1107/cadvisor,guoshimin/cadvisor,IFTTT/cadvisor,ainsleyc/cadvisor,feiskyer/cadvisor,ncdc/cadvisor,pwittrock/cadvisor,feiskyer/cadvisor,jhjeong-kr/cadvisor,linux-on-ibm-z/cadvisor,jhjeong-kr/cadvisor,BrickXu/cadvisor,ncdc/cadvisor,ncdc/cadvisor,erSitzt/cadvisor,erSitzt/cadvisor,erSitzt/cadvisor,ainsleyc/cadvisor,vishh/cadvisor,dchen1107/cadvisor,shilpamayanna/cadvisor,timstclair/cadvisor,f0/cadvisor,ncdc/cadvisor,carmark/cadvisor,dchen1107/cadvisor,ncdc/cadvisor,erSitzt/cadvisor,IFTTT/cadvisor,f0/cadvisor,IFTTT/cadvisor,jhjeong-kr/cadvisor,ainsleyc/cadvisor,derekwaynecarr/cadvisor,datawisesystems/cadvisor,vishh/cadvisor,timstclair/cadvisor,f0/cadvisor,BrickXu/cadvisor,jhjeong-kr/cadvisor,vishh/cadvisor,linux-on-ibm-z/cadvisor,derekwaynecarr/cadvisor,linux-on-ibm-z/cadvisor,normanjoyner/cadvisor,BrickXu/cadvisor,timstclair/cadvisor,pwittrock/cadvisor,erSitzt/cadvisor,BrickXu/cadvisor,guoshimin/cadvisor,f0/cadvisor,ainsleyc/cadvisor