Additional jdbc regression tests submitted by Oliver Jowett. Some tests are

currently commented out, pending fixes for the bugs these tests uncovered.

 Modified Files:
 	jdbc/org/postgresql/test/jdbc2/Jdbc2TestSuite.java
 	jdbc/org/postgresql/test/jdbc2/ServerPreparedStmtTest.java
 Added Files:
 	jdbc/org/postgresql/test/jdbc2/CursorFetchTest.java