This reverts commit 05021f11a2.
This switches Zuul and Nodepool to use Zookeeper TLS. The ZK
cluster is already listening on both ports.
Change-Id: I03d28fb75610fbf5221eeee28699e4bd6f1157ea
nodepool base setup
Role Variables
Install zookeeper to the node. This is not expected to be used in production, where the nodes would connect to an externally configured zookeeper instance. It can be useful for basic loopback tests in the gate, however.