DERBY-6237(PreparedStatement.execute() fails starting 10.2 when multiple rows are updated and PreparedStatement.setCharacterStream(int, Reader, int) is used)

Separating the testing of setCharacterStream on CLOB and VARCHAR as two separate tests so failure of one data type does not prevent testing of the other data type. 



git-svn-id: https://svn.apache.org/repos/asf/db/derby/code/branches/10.1@1488598 13f79535-47bb-0310-9956-ffa450edef68