Bug 182670 ScriptedDataSet does not use the same classloader when ran for Parameters than when ran for the report
viewer/org.eclipse.birt.report.viewer/birt/WEB-INF/classes/org/eclipse/birt/report/utility/BirtUtility.java
* find the parameter handle by parameter name
	 * 
	 * @param reportDesignHandle
	 * @param paramName
	 * @return
	 * @throws ReportServiceException
	 */
	public static ParameterHandle findParameter(
			IViewerReportDesignHandle reportDesignHandle, String paramName )
			throws ReportServiceException
	{
		if ( paramName == null )
			return null;
		IReportRunnable runnable = (IReportRunnable) reportDesignHandle
				.getDesignObject( );
		if ( runnable == null )
			return null;
		
		ModuleHandle model = runnable.getDesignHandle( ).getModuleHandle( );
		if ( model == null )
			return null;
		return model.findParameter( paramName );
	}
	/**
	 * Gets the module option map from the request.
	 * 
	 * @param request
	 *            the request
	 * @return the module options
	 */