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
{
	/*
	 * none value
	 */
	public final static String NONE = "none"; 
	/**
	 * Add current task in http session
	 * 
	 * @param request
	 * @param task