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
{
        if( userName == null )
            return EMPTY_STRING;
		return getTrimedString(userName.getText( ));
	}
    /**
     * get password
     * @return
     */
	private String getODAPassword( )
	{
        if( password == null )
            return EMPTY_STRING;
		return getTrimedString(password.getText( ));
	}
	/**
	 * get driver url
	 * @return
	 */
	private String getDriverURL( )
	{
        if( jdbcUrl == null )
            return EMPTY_STRING;
		return getTrimedString(jdbcUrl.getText( ));
	}
	/**
	 * get driver class
	 * @return
	 */
	private String getDriverClass( )