Project: mesos
Issue MESOS-5413: `network/cni` isolator should skip the bind mounting of the CNI network information root directory if possible
Currently in the create() method `network/cni` isolator, for the CNI network information root directory (i.e., {{/var/run/mesos/isolators/network/cni}}), we do a self bind mount and make sure it is a shared mount of its own peer group. However, we should not do a self bind mount if the mount containing the CNI network information root directory is already a shared mount in its own share peer group, just like what we did for `filesystem/linux` isolator in [MESOS-5239 | https://issues.apache.org/jira/browse/MESOS-5239].
Story points: 3