Use AQR to retry SQLCODE -8606 with error 97

This change adds to the list of errors retried with the
SQLCODE -8606 with error 97. It also adds and uses a new
AQR type to clear  the htable cache.

Closes-Bug: #1359259

Change-Id: If01fa14875024aad51ccdd5d1ae08e3c241e35cd
Merge "Use AQR to retry SQLCODE -8606 with error 97"