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 TEMPLATE_ELEMENT_TYPE_TEXT = "Text"; 
	public static final String TEMPLATE_ELEMENT_TYPE_EXTENDED_ITEM = "ExtendedItem"; 
	public static final String TEMPLATE_ELEMENT_TYPE_TEXT_DATA = "TextData"; 
	public static final String TEMPLATE_ELEMENT_TYPE_DATA_SET = "DataSet"; 
	/**
	 * sortType -- the sort type. The first constant is the name of the sortType
	 * choice set. The followed constants are valid choice values of the
	 * sortType.
	 */
	public static final String CHOICE_SORT_TYPE = "sortType"; 
	public static final String SORT_TYPE_NONE = "none"; 
	public static final String SORT_TYPE_SORT_ON_GROUP_KEY = "sort-on-group-key"; 
	public static final String SORT_TYPE_COMPLEX_SORT = "complex-sort"; 
	/**
	 * joinType -- join type of join condition.
	 */
	public static final String CHOICE_JOIN_TYPE = "joinType"; 
	public static final String JOIN_TYPE_INNER = "inner"; 
	public static final String JOIN_TYPE_LEFT_OUT = "left-out"; 
	public static final String JOIN_TYPE_RIGHT_OUT = "right-out"; 
	public static final String JOIN_TYPE_FULL_OUT = "full-out"; 
	/**
	 * joinOperator -- join operator of join condition.
	 */
	public static final String CHOICE_JOIN_OPERATOR = "joinOperator"; 
	public static final String JOIN_OPERATOR_EQALS = "eq"; 
	/**
	 * actionTargetFileType -- target type of the linked file
	 */
	public static final String CHOICE_ACTION_TARGET_FILE_TYPE = "actionTargetFileType";