Add variable for cluster partition handling
Add variable for cluster partition handling

- It is still used in a bunch o places like the soak pipeline

[#148578615]

Signed-off-by: Hannes Hoerl <17448acfc18acc88f99224f1c5ed1fc5d92e18df@pivotal.io>

pivotal-cf/cf-rabbitmq-release,pivotal-cf/cf-rabbitmq-release,pivotal-cf/cf-rabbitmq-release,pivotal-cf/cf-rabbitmq-release