Previously, drivers were responsible for making the substitution themselves.
In practice they all (Firebird, ODBC and JDBC) used the LibreOffice SQL
parser to parse the SQL statement and do the substitution.

This had a few negative consequences:
 * The substitition was applied to _all_ SQL commands, including
   queries having the "execute SQL directly" bit set. Which means
   that the SQL was _not_ sent to the DBMS exactly as typed by
   the user. Even if there was no substitution to be made, since
   the SQL command was always round-tripped through the parser,
   thus "normalising" it (which is what led to tdf#104986).
 * "execute SQL directly" queries "magically" behaved slightly
   differently depending on whether the LibreOffice SQL parser
   succeeded in parsing them or not.

Change-Id: Ieedc643f33467435a139e2565a01e6f398af041f
Reviewed-on: https://gerrit.libreoffice.org/47283Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Lionel Elie Mamane <lionel@mamane.lu>