[Upgrade Test] Autofailover of GSI node is not triggering after upgrade from 6.6.5 to 7.1.0

After upgrading the cluster the auto-failover for index node is not happening.

Steps to reproduce:

1. Create a cluster with 5 nodes kv-index-index-kv-n1ql and load the data
2. Create Primary index and couple of secondary indexes with 1 replica
3. Do offline upgrade of all the nodes
4. Bring the server down on one of the index node and wait for auto-failover to trigger.
5. Auto-failover doesn't get trigger.