Bug 201368 Support "Not In" operator in filter list
Description: After we support "IN" filter we should also support the "Not In" filter. Data part has already support the "Not In" filter, so hope model can support that operator in the filter operator list. Regards!
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/api/elements/DesignChoiceConstants.java
public static final String VIEW_ACTION_NO_CHANGE = "NoChange"; 
	public static final String VIEW_ACTION_CHANGED = "Changed"; 
	public static final String VIEW_ACTION_ADDED = "Added"; 
	public static final String VIEW_ACTION_DELETED = "Deleted"; 
	/**
	 * measure Function -- measure function type.
	 */
	public static final String CHOICE_AGGREGATION_FUNCTION = "aggregationFunction"; 
	public static final String AGGREGATION_FUNCTION_SUM = "sum"; 
	public static final String AGGREGATION_FUNCTION_COUNT = "count"; 
	public static final String AGGREGATION_FUNCTION_MIN = "min"; 
	public static final String AGGREGATION_FUNCTION_MAX = "max"; 
	public static final String AGGREGATION_FUNCTION_AVERAGE = "average"; 
	public static final String AGGREGATION_FUNCTION_WEIGHTEDAVG = "weighted-avg"; 
	public static final String AGGREGATION_FUNCTION_STDDEV = "stddev"; 
	public static final String AGGREGATION_FUNCTION_FIRST = "first"; 
	public static final String AGGREGATION_FUNCTION_LAST = "last"; 
	public static final String AGGREGATION_FUNCTION_MODE = "mode"; 
	public static final String AGGREGATION_FUNCTION_MOVINGAVE = "moving-ave"; 
	public static final String AGGREGATION_FUNCTION_MEDIAN = "median"; 
	public static final String AGGREGATION_FUNCTION_VARIANCE = "variance"; 
	public static final String AGGREGATION_FUNCTION_RUNNINGSUM = "running-sum"; 
	public static final String AGGREGATION_FUNCTION_IRR = "irr"; 
	public static final String AGGREGATION_FUNCTION_MIRR = "mirr"; 
	public static final String AGGREGATION_FUNCTION_NPV = "npv"; 
	public static final String AGGREGATION_FUNCTION_RUNNINGNPV = "running-npv"; 
	public static final String AGGREGATION_FUNCTION_COUNTDISTINCT = "count-distinct"; 
	public static final String AGGREGATION_FUNCTION_RUNNINGCOUNT = "running-count"; 
	public static final String AGGREGATION_FUNCTION_IS_TOP_N = "is-top-n"; 
	public static final String AGGREGATION_FUNCTION_IS_BOTTOM_N = "is-bottom-n";