Assertion tripped for skip scan with two unit tests

After checking in a pretty sizeable change (https://git-wip-us.apache.org/repos/asf?p=phoenix.git;a=commit;h=d018cc1c6e01d9836de6e67af4f8b91de3269bfd), the assert in SkipScanFilter.setNextCellHint() started getting tripped for the following unit tests:

• DeleteIT.testDeleteAllFromTableWithIndexNoAutoCommitNoSalting()
• MutableIndexIT.testCoveredColumnUpdatesWithLocalIndex()

The tests seem to pass without this assert (not sure what HBase does if the seek next hint is the same as the current row), but it would be good to get to the bottom of this. Would you mind taking a look, rajesh23? It's possibly related to PHOENIX-1313.