PathChildrenCache doesn't throw exceptions when path doesn't exist

[youest]

PathChildrenCache doesn't throw exceptions when path doesn't exist on zookeeper server,
so in this case if you start a cache previous of path creation, then the listener doesn't catch any event.
This behavior is not logged in, so the user cannot do action to actuate any sort of compensation.

[Randgalt]

I've fixed this and push a new build. PathChildrenCache now ensures the path. I'll build new binaries soon.