Add a precheck to ensure nscd is not running
Add a precheck to ensure nscd is not running

The 'name service caching daemon (nscd)' seems to effectively disable
Docker's user namespace when '/run' is bind mounted. This can cause
issues with Kolla containers that use this mount, if the uid the
container runs as exists on the system, they clash and container will
either fail to start, have sudo issues, etc.

Change-Id: I9ac6bdb193f1520d025251d3abfa761700481cc9
Closes-Bug: #1723934

dardelean/kolla-ansible,dardelean/kolla-ansible,dardelean/kolla-ansible