Bug 153537 Event Handler didn't work properly in masterpage
Steps to reproduce: 1.Run the attached report in Web Viewer, it works well 2.Click "print" to convert the output in PDF Expected result: Masterpage has the same view in Web Viewer and PDF Actual result: Masterpage didn't get right view
engine/org.eclipse.birt.report.engine/src/org/eclipse/birt/report/engine/executor/ExecutionContext.java
* @param name
	 * @param value
	 */
	public void setParameterValue( String name, Object value )
	{
		Object parameter = params.get( name );
		if ( parameter instanceof ParameterAttribute )
		{
			( (ParameterAttribute) parameter ).setValue( value );
		}
		else
		{
			params.put( name, new ParameterAttribute( value, null ) );
		}
	}
	/**
	 * @param name
	 * @param value
	 */
	public void setParameter( String name, Object value, String displayText )
	{
		params.put( name, new ParameterAttribute( value, displayText ) );
	}
	public void clearParameters( )
	{
		params.clear( );
	}
	public Object getParameterValue( String name )
	{
		Object parameter = params.get( name );