Bug 135254 "Test connection" should be disabled after cancelling "Manage Drivers" window
Steps to reproduce: 1.New a JDBC data source 2.Before enter Driver class/URL, notice that "Test Connection" is disabled 3.Click "Manage Drivers", and then cancel it Expected result: "Test Connection" is disabled Actual result: "Test Connection" is enabled
data/org.eclipse.birt.report.data.oda.jdbc.ui/src/org/eclipse/birt/report/data/oda/jdbc/ui/profile/JDBCSelectionPageHelper.java
*/
	private void okPressedProcess( )
	{
		String driverClassName = getSelectedDriverClassName( );
		List lst = JdbcToolKit.getJdbcDriversFromODADir( JDBC_EXTENSION_ID );
		driverChooserCombo.setInput( sortDriverList( lst ) );
		setDriverSelection( driverClassName, driverChooserCombo, lst );
	}
	
	
	/**
	 * Attempts to connect to the Jdbc Data Source using the properties (
	 * username, password, driver class ) specified.
	 * 
	 * @param: showErrorMessage is set to true , and error dialog box will be
	 *         displayed if the connection fails.
	 * 
	 * @return Returns true if the connection is OK,and false otherwise
	 * @throws OdaException 
	 */
	private boolean testConnection( ) throws OdaException
	{
		if ( !isValidDataSource( ) )
		{
			return false;
		}
		
		String url = jdbcUrl.getText( ).trim( );
		String userid = userName.getText( ).trim( );
		String passwd = password.getText( );