Change ksync flow to use flow handle as part of the key, so on index change
we will delete the previous object with old index and create new with current
index.

Change-Id: I6f29b30c573739d69f4f23df391ec153689c31b4
Merge "Change ksync flow to use flow handle as part of the key, so on index change we will delete the previous object with old index and create new with current index."