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
/**
	 * Finalize the instance.
	 */
	public void finalize( )
	{
		if ( this.parameterTask != null )
		{
			this.parameterTask.close( );
			this.parameterTask = null;
		}
	
		if ( this.reportDocumentInstance != null )
		{
			this.reportDocumentInstance.close( );
			this.reportDocumentInstance = null;
		}
		
		if ( this.reportRunnable != null )
		{
			this.reportRunnable = null;
		}
	}
	/**
	 * @return Returns the parameterTask.
	 */
	public IGetParameterDefinitionTask getParameterTask( )
	{
		return parameterTask;
	}
	/**