Bug 131245 [Smoke][Regression]Run Report window in Web View cannot display existed parameteres.
Description: Run Report window in Web View cannot display existed parameteres. Steps to reproduce: 1. New a parameter. 2. Preview in Web Viewer 3. Click Run Report button. Result: No parameter showed.
viewer/org.eclipse.birt.report.viewer/birt/WEB-INF/classes/org/eclipse/birt/report/context/ViewerAttributeBean.java
{
	/**
	 * Identify the incoming request category.
	 */
	private String category = "BIRT"; 
	
	/**
	 * Need to store the exception.
	 */
	private Exception exception = null;
	
	/**
	 * Report runnable.
	 */
	private IReportRunnable reportRunnable = null;
	/**
	 * Report document.
	 */
	private IReportDocument reportDocumentInstance = null;
	
	/**
	 * Get report parameter task.
	 */
	private IGetParameterDefinitionTask parameterTask = null;
	/**
	 * Get report parameters passed in by URL.