Downscale is not working if master is not the last Pod
After creating a cluster of 2 nodes and trying to downscale to 1 the operator will prevent that and output the following message:
2020-01-31 11:53:48,585 DEBUG [io.st.op.cl.ClusterStatefulSetHandler] (Cluster-ReconciliationCycle) Not downscaling cluster default.simple since there is no primary Pod or is not marked as non disruptible