/var/lib/docker does not have correct SELinux label

[praveenkumar]

Refer: https://github.com/minishift/minishift/issues/2021

Looks like during the mailing conversation @rhatdan pointed out there might be SELinux mislabel occurred when we created the bind mount on xfs file system.

Just after minishift started

# ls -lZ /var/lib/ | grep docker
drwx--x--x. root root    system_u:object_r:unlabeled_t:s0 docker

After restoring SELinux context

# restorecon -R -v /var/lib/docker/
# ls -lZ /var/lib/ | grep docker
drwx--x--x. root root    system_u:object_r:container_var_lib_t:s0 docker
``

[praveenkumar]

resolved by #217