Bug 140534 [Smoke]Can't changed the value of parameter use show report parameter
Details: [Smoke]Can't changed the value of parameter use show report parameter Step: 1. New a parameter. 2. Change display type to list box. 3. Insert some value into selection value and set the first value to default value. 4. Drop the parameter inro layout 5. Preview and press show report parameter, change the value and press OK. Actual result: The value can't be changed.
viewer/org.eclipse.birt.report.viewer/birt/WEB-INF/classes/org/eclipse/birt/report/context/BaseAttributeBean.java
this.missingParameter = validateParameters( parameterList,
				this.parameters );
	}
	protected IViewerReportDesignHandle getDesignHandle(
			HttpServletRequest request )
	{
		return new BirtViewerReportDesignHandle( null, reportDesignName );
	}
	/**
	 * @return Returns the parameterBean.
	 */
	public ParameterAttributeBean getParameterBean( )
	{
		return parameterBean;
	}
	/**
	 * @param parameterBean
	 *            The parameterBean to set.
	 */
	public void setParameterBean( ParameterAttributeBean parameterBean )
	{
		this.parameterBean = parameterBean;
	}
	/**
	 * @return Returns the reportTitle.
	 */
	public String getReportTitle( )
	{
		return reportTitle;
	}