Revert "Remove container on stopping on Docker provider. Fixes #389"

[dustymabe]

Reverts #457

This commit doesn't work well when trying to docker stop and remove from inside a container. devicemapper will give an error. Reverting for now until we figure out what the issue is.

See comments at the end of #457

[cdrage]

I can confirm that I'm getting this issue running this within a container.

lib/atomicapp/projectatomic-helloapache-a6b307fbadaa                                                                    ⍉
▶ aad stop /var/lib/atomicapp/projectatomic-helloapache-97b0e589e8e3 --provider=docker
2015-12-16 21:11:00,728 - atomicapp.plugin - WARNING - Configuration option 'providerconfig' not found
2015-12-16 21:11:00,728 - atomicapp.plugin - WARNING - Configuration option 'providerconfig' not found
2015-12-16 21:11:00,741 - docker - INFO - Undeploying to provider: Docker
2015-12-16 21:11:00,819 - docker - INFO - STOPPING AND REMOVING CONTAINER: default_centos-httpd_8295ce4f8f38
default_centos-httpd_8295ce4f8f38
Error response from daemon: Cannot destroy container default_centos-httpd_8295ce4f8f38: Driver aufs failed to remove root filesystem ce4cdd086d9b5b66db17cab088b71557af6055fb542d86baa5f804b4044c4443: rename /var/lib/docker/aufs/mnt/ce4cdd086d9b5b66db17cab088b71557af6055fb542d86baa5f804b4044c4443 /var/lib/docker/aufs/mnt/ce4cdd086d9b5b66db17cab088b71557af6055fb542d86baa5f804b4044c4443-removing: device or resource busy
FATA[0000] Error: failed to remove one or more containers 
2015-12-16 21:11:01,206 - __main__ - ERROR - Command '['docker', 'rm', 'default_centos-httpd_8295ce4f8f38']' returned non-zero exit status 1
Traceback (most recent call last):
  File "/opt/atomicapp/atomicapp/cli/main.py", line 90, in cli_stop
    nm.stop(**argdict)
  File "/opt/atomicapp/atomicapp/nulecule/main.py", line 232, in stop
    self.nulecule.stop(cli_provider, dryrun)
  File "/opt/atomicapp/atomicapp/nulecule/base.py", line 153, in stop
    component.stop(provider_key, dryrun)
  File "/opt/atomicapp/atomicapp/nulecule/base.py", line 277, in stop
    provider.undeploy()
  File "/opt/atomicapp/atomicapp/providers/docker.py", line 144, in undeploy
    subprocess.check_call(cmd)
  File "/usr/lib/python2.7/subprocess.py", line 540, in check_call
    raise CalledProcessError(retcode, cmd)
CalledProcessError: Command '['docker', 'rm', 'default_centos-httpd_8295ce4f8f38']' returned non-zero exit status 1