Register factories in Start() instead of New().
Register factories in Start() instead of New().

This will allow for delayed registration for client users (e.g.: Kubelet).

derwolfe/cadvisor,ainsleyc/cadvisor,pwittrock/cadvisor,hacpai/cadvisor,ChengTiesheng/cadvisor,hzy001/cadvisor,mr-justin/cadvisor,aivarasko/cadvisor,erSitzt/cadvisor,jzaefferer/cadvisor,megamsys/cadvisor,ChengTiesheng/cadvisor,BrickXu/cadvisor,Clever/cadvisor,erSitzt/cadvisor,hacpai/cadvisor,jimmidyson/cadvisor,mr-justin/cadvisor,ChengTiesheng/cadvisor,c-st/cadvisor,hw-qiaolei/cadvisor,IFTTT/cadvisor,bing6/cadvisor,datawisesystems/cadvisor,difro/cadvisor,datawisesystems/cadvisor,erSitzt/cadvisor,yifan-gu/cadvisor,bowlofstew/cadvisor,wulonghui/cadvisor,dalanlan/cadvisor,guoshimin/cadvisor,morpheyesh/cadvisor,megamsys/cadvisor,takecy/cadvisor,jzaefferer/cadvisor,aivarasko/cadvisor,ncdc/cadvisor,ncdc/cadvisor,feiskyer/cadvisor,jzaefferer/cadvisor,jimonreal/cadvisor,takecy/cadvisor,linux-on-ibm-z/cadvisor,jhjeong-kr/cadvisor,ncdc/cadvisor,kmicheal/cadvisor,bowlofstew/cadvisor,hacpai/cadvisor,takecy/cadvisor,yolkov/cadvisor,f0/cadvisor,normanjoyner/cadvisor,yolkov/cadvisor,derwolfe/cadvisor,dchen1107/cadvisor,hzy001/cadvisor,erSitzt/cadvisor,jimmidyson/cadvisor,mangalaman93/cadvisor,IFTTT/cadvisor,CrazyJvm/cadvisor,IFTTT/cadvisor,f0/cadvisor,afein/cadvisor,whosthatknocking/cadvisor,pwittrock/cadvisor,linux-on-ibm-z/cadvisor,rajthilakmca/cadvisor,jimmidyson/cadvisor,BrickXu/cadvisor,derekwaynecarr/cadvisor,anarcher/cadvisor,jmaitrehenry/cadvisor,jmaitrehenry/cadvisor,linux-on-ibm-z/cadvisor,carmark/cadvisor,afein/cadvisor,feiskyer/cadvisor,carmark/cadvisor,jhjeong-kr/cadvisor,atyenoria/cadvisor,wulonghui/cadvisor,whosthatknocking/cadvisor,dchen1107/cadvisor,timstclair/cadvisor,timstclair/cadvisor,dchen1107/cadvisor,anarcher/cadvisor,ncdc/cadvisor,shilpamayanna/cadvisor,atyenoria/cadvisor,BrickXu/cadvisor,timstclair/cadvisor,vegasbrianc/cadvisor,IFTTT/cadvisor,c-st/cadvisor,hw-qiaolei/cadvisor,BrickXu/cadvisor,kmicheal/cadvisor,kmicheal/cadvisor,normanjoyner/cadvisor,rajthilakmca/cadvisor,mr-justin/cadvisor,derekwaynecarr/cadvisor,bing6/cadvisor,yifan-gu/cadvisor,feiskyer/cadvisor,jimonreal/cadvisor,ncdc/cadvisor,jhjeong-kr/cadvisor,guoshimin/cadvisor,vegasbrianc/cadvisor,whosthatknocking/cadvisor,ainsleyc/cadvisor,f0/cadvisor,derwolfe/cadvisor,erSitzt/cadvisor,ainsleyc/cadvisor,CrazyJvm/cadvisor,difro/cadvisor,Snorch/cadvisor,Clever/cadvisor,morpheyesh/cadvisor,aivarasko/cadvisor,jhjeong-kr/cadvisor,yifan-gu/cadvisor,rajthilakmca/cadvisor,jhjeong-kr/cadvisor,difro/cadvisor,mangalaman93/cadvisor,mangalaman93/cadvisor,c-st/cadvisor,shilpamayanna/cadvisor,CrazyJvm/cadvisor,derekwaynecarr/cadvisor,jmaitrehenry/cadvisor,dchen1107/cadvisor,dchen1107/cadvisor,derekwaynecarr/cadvisor,yolkov/cadvisor,vishh/cadvisor,bing6/cadvisor,hzy001/cadvisor,f0/cadvisor,bpradipt/cadvisor,Clever/cadvisor,jimonreal/cadvisor,vishh/cadvisor,bowlofstew/cadvisor,bpradipt/cadvisor,Snorch/cadvisor,f0/cadvisor,vegasbrianc/cadvisor,Snorch/cadvisor,derekwaynecarr/cadvisor,ainsleyc/cadvisor,pwittrock/cadvisor,hw-qiaolei/cadvisor,atyenoria/cadvisor,wulonghui/cadvisor,IFTTT/cadvisor,vishh/cadvisor,bpradipt/cadvisor,anarcher/cadvisor,dalanlan/cadvisor,dalanlan/cadvisor,BrickXu/cadvisor,guoshimin/cadvisor