Revert "PHOENIX-1524 Bump default HBase version to 0.98.8 after PHOENIX-1470"

This reverts commit 7a571d03824d79e7d1c25ca34c45517bee7f7aaf.
Revert "Amend PHOENIX-1470 KEEP_DELETED_CELLS interface changed in HBase 0.98.8 (Jesse Yates)"

This reverts commit 79b43c1987eaba1ac6dad1c873fd404d888190d1.
Revert "PHOENIX-1470 KEEP_DELETED_CELLS interface changed in HBase 0.98.8 (Jesse Yates)"

This reverts commit a6b1d385ae30fae0ef98aa01829e16b9d900aaf6.