mount config.yaml as readonly mode, remove it in host when removing container
support run daemon, daemon docker will be named as appname_0
use ident to ident job is daemon or not
clearn nginx conf when no container in this host
Merge branch 'clear_nginx_conf' into 'master'

Clear nginx conf

clear nginx conf
Merge branch 'master' of git.hunantv.com:platform/levi into dev
Merge branch 'dev' into 'master'

add daemon support

if job.daemon was set a empty string, job.ident would be job.bind. Otherwise, job.ident will be daemon_job.daemon.

In nginx load process, ngxin loader will ignore container which was named as appname_daemon_did.

In nginx remove process, nginx remover will ignore container which cid was not in mapping.

In container add process, env will generate config file which is named as config_job.daemon.yaml. If job was a daemon job, levi will not bind port to container.

In contaner remove process, env will be clear.