There is no reason to have a hostname-unique pidfile in the container
as we currently have. This posed problems with kolla-mesos reusing
the same script. Since there is no reason for this pidfile to be
configurable in path _at_ _all_, we hardcode the path.

Additionally, we adjust the file perm change to only update the perms
on the folder if it is not already properly set.

This also incorperates a kolla-ansible file in the bootstrap process
which follows our other container techniques of using the idempotent
creation of a volume in the bootstrap process (see nova)

TrivialFix
Related-Bug: #1538136
Change-Id: I2380529fc7146a9603145cdc31e649cb8841f7dd