Bug 191404 Connection is still successful after delete drivers[0703]
Description: Create a Sqlserver datasource and dataset, then delete the jtds driver. Click "Test Connection" is still successful, and the dataset still works. Build Version:2.2.0.v20070607-0630 Steps to reproduce: 1. Add a jtds driver, and create a Sqlserver connection and dataset. 2. Go to "Manage JDBC Drivers" dialog, and delete the driver. 3. Click "Test Connection", the connection is successful. 4. Click "Preview Results" in "Edit Data Set" dialog, it works. Expected Result: Delete driver will lose the connection.
data/org.eclipse.birt.report.data.oda.jdbc.ui/src/org/eclipse/birt/report/data/oda/jdbc/ui/dialogs/JdbcDriverManagerDialog.java
{
			Composite composite = (Composite) super.createDialogArea( parent );
			GridLayout layout = new GridLayout( 2, false );
			layout.marginHeight = 10;
			layout.marginWidth = 10;
			layout.verticalSpacing = 5;
			composite.setLayout( layout );
			Label lb = new Label( composite, SWT.NONE );
			lb.setText( JdbcPlugin.getResourceString( "driverManagerDialog.text.EditDriverClassName" ) ); 
			classNameLabel = new Label( composite, SWT.NONE );
			classNameLabel.setLayoutData( new GridData( GridData.FILL_HORIZONTAL ) );
			classNameLabel.setText( className );
			lb = new Label( composite, SWT.NONE );
			lb.setText( JdbcPlugin.getResourceString( "driverManagerDialog.text.EditDriverDisplayName" ) ); 
			displayNameText = new Text( composite, SWT.BORDER );
			displayNameText.setLayoutData( new GridData( GridData.FILL_HORIZONTAL ) );
			displayNameText.setText( displayName );
			displayNameText.addModifyListener( new ModifyListener( ) {
				public void modifyText( ModifyEvent e )
				{
					displayName = displayNameText.getText( );
				}
			} );
			lb = new Label( composite, SWT.NONE );
			lb.setText( JdbcPlugin.getResourceString( "driverManagerDialog.text.EditDriverTemplate" ) ); 
			templateText = new Text( composite, SWT.BORDER );
			templateText.setLayoutData( new GridData( GridData.FILL_HORIZONTAL ) );
			templateText.setText( template );
			templateText.addModifyListener( new ModifyListener( ) {
				public void modifyText( ModifyEvent e )