Fixed bug 9916: added the "TABLE" bit to the query.
[#9916] Add TABLE to TRUNCATE SQL in flushSessions

Fixes error on SQLSRV platform

Merge remote-tracking branch 'fireproofsocks/bug-9916' into release-2.2

* fireproofsocks/bug-9916:
  Fixed bug 9916: added the "TABLE" bit to the query.