Enable NATS password rotation
Enable NATS password rotation

Currently ETCD jobs depend on being able to re-connect to NATS. If you
change NATS password, the ETCD jobs fail, because they are already
configured to use new password, but NATS has not been updated yet. But
due to serial updates, NATS will not get updated before ETCD update has
finished. The whole deploy then fails.

Rearrange jobs so that NATS deploys after consul_z1, concurrently with
consul_z2 and before ETCD jobs.

jimconner/paas-cf,jimconner/paas-cf,jimconner/paas-cf,alphagov/paas-cf,alphagov/paas-cf,alphagov/paas-cf,jimconner/paas-cf,jimconner/paas-cf,jimconner/paas-cf,jimconner/paas-cf,alphagov/paas-cf,alphagov/paas-cf,alphagov/paas-cf,alphagov/paas-cf,alphagov/paas-cf