Add conf200[123] Zookeeper Service nodes in codfw.

Authored by elukey on Apr 26 2016, 1:12 PM.

Description

Add conf200[123] Zookeeper Service nodes in codfw.

We need to set up the new conf200[123] ZK service nodes in codfw,
to the hiera variables should be specified in DC specific config files.
This changes should be a no-op for the services currently using ZK
in eqiad, namely Hadoop and Kafka. The etcd role and config will be
added on a later stage.
The zookeeper_url hiera variable is also removed since not used anymore.

Bug: T131959
Change-Id: I0374e492cb5ba22141b527ca5f832c7b5c073058