Bug 183733 Implement the IScriptOjectClassInfo to provide the class infromation to support the JS code assistant.
Engine should implement the IScriptObjectClassInfo interface to return the class information for script object.
engine/org.eclipse.birt.report.engine/src/org/eclipse/birt/report/engine/executor/ExecutionContext.java
{
		Object parameter = params.get( name );
		if ( parameter instanceof ParameterAttribute )
		{
			( (ParameterAttribute) parameter ).setValue( value );
		}
		else
		{
			params.put( name, new ParameterAttribute( value, null ) );
		}
	}
	/**
	 * @param name
	 * @param value
	 */
	public void setParameter( String name, Object value, String displayText )
	{
		params.put( name, new ParameterAttribute( value, displayText ) );
	}
	public void clearParameters( )
	{
		params.clear( );
	}
	public Object getParameterValue( String name )
	{
		Object parameter = params.get( name );
		if ( parameter != null )
		{
			return ( (ParameterAttribute) parameter ).getValue( );
		}