upgrade from 4.1 to 4.5 beta causes index round robin logic on create index to fail

this is similar to what customer is seeing.
steps:

• set up a cluster with 3 nodes - all nodes and all services on 4.1 GA.
• get travel sample added to the cluster.
• upgrade all nodes to 4.5 with an in place upgrade in a rolling fashion
• create 3 new indexes and verify that round robin index creation works - that is each new index is created on a separate node.