Bug 211004 Failed to remove temp db directory after running multiple reports
Description: I use Report Engine API to do runAndrender, run and dataextract tasks on multiple reports. Before the Platform started, I change the temp folder(System.setProperty( "java.io.tmpdir", TEMP_HOME )). Each task is closed after it finished and I shutdown the Platform after all the tasks finished. In log I found "Fail to remove one or more file in temp db directory,but it will be removed when the VM exits: D:\BIRT_NG\temp/BIRTSampleDB_1196129572031_10a6ae2". In temp folder the BIRTSampleDB_XXX is still here but not removed. I think it is the issue when remove the Temp sampleDB. Build number: 2.3.0.v20071127-0630
data/org.eclipse.birt.report.data.oda.jdbc/src/org/eclipse/birt/report/data/oda/jdbc/JDBCDriverManager.java
* @param userId        the login user id
     * @param password      the login password
     * @return  true if the the specified properties are valid to obtain a connection;
     *          false otherwise
     * @throws OdaException 
     */
    public boolean testConnection( String driverClassName,
            String connectionString, String jndiNameUrl,
            String userId, String password )
        throws OdaException
    {		
		boolean canConnect = false;
		try
		{
			
			if ( getDriverConnectionFactory( driverClassName ) != null )
			{
				tryCreateConnection( driverClassName, connectionString, userId, password);
				return true;
			}
            
            
            
            
            if ( jndiNameUrl != null )
            {
                Connection jndiDSConnection = 
                    getJndiDSConnection( driverClassName, jndiNameUrl, 
                            addUserAuthenticationProperties( null, userId, password ) );            
                if ( jndiDSConnection != null )