add docker rm before start a new one in units/jenkins.service
add docker rm before start a new one in units/jenkins.service

xuwang/coreos-docker-dev,xueshanf/coreos-docker-dev,remoe/coreos-docker-dev,remoe/coreos-docker-dev,remoe/coreos-docker-dev,xuwang/coreos-docker-dev,xueshanf/coreos-docker-dev,xueshanf/coreos-docker-dev,xueshanf/coreos-docker-dev,remoe/coreos-docker-dev,xuwang/coreos-docker-dev,xueshanf/coreos-docker-dev,xuwang/coreos-docker-dev