CBQE-820 indentation cause rebalance failuer

cause of indentation nodes getting added or deleted twice

Change-Id: I24a5bcce9a9cfc66142c5e99564721df26017845
Reviewed-on: http://review.couchbase.org/23892
Reviewed-by: Rohit Sinha1 <rohit.sinha1@globallogic.com>
Tested-by: Rohit Sinha1 <rohit.sinha1@globallogic.com>