Previously, the NOT EQUAL operator was hardcoded as "!=", so the SQL statement
generated for a query containing NOT EQUAL had the "!=" operator. Unfortunately
Symfoware database does not support the "!=" operator. The attached patch fixes
this issue by removing the hardcoded "!=" and doing a getNotEqual() which
returns "<>" for Symfoware and "!=" for other databases. This issue was
discovered when running cmp CTS tests. The patch fix has been tested on both
Symfoware and Derby successfully.