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
* stringFormat.
	 */
	public static final String CHOICE_STRING_FORMAT_TYPE = "stringFormat"; 
	public static final String STRING_FORMAT_TYPE_UNFORMATTED = "Unformatted"; 
	public static final String STRING_FORMAT_TYPE_UPPERCASE = ">"; 
	public static final String STRING_FORMAT_TYPE_LOWERCASE = "<"; 
	public static final String STRING_FORMAT_TYPE_CUSTOM = "Custom"; 
	public static final String STRING_FORMAT_TYPE_ZIP_CODE = "Zip Code"; 	
	public static final String STRING_FORMAT_TYPE_ZIP_CODE_4 = "Zip Code + 4"; 	
	public static final String STRING_FORMAT_TYPE_PHONE_NUMBER = "Phone Number"; 
	public static final String STRING_FORMAT_TYPE_SOCIAL_SECURITY_NUMBER = "Social Security Number"; 
	
	public static final String CHOICE_TARGET_NAMES_TYPE = "targetNames"; 
	public static final String TARGET_NAMES_TYPE_BLANK = "_blank"; 
	public static final String TARGET_NAMES_TYPE_SELF = "_self"; 
	public static final String TARGET_NAMES_TYPE_PARENT = "_parent"; 
	public static final String TARGET_NAMES_TYPE_TOP = "_top"; 
	/**
	 * templateElementType -- the template element type The first constant is
	 * the name of the templateElementType choice set. The followed constants
	 * are valid choice values of the templateElementType.
	 */
	public static final String CHOICE_TEMPLATE_ELEMENT_TYPE = "templateElementType"; 
	public static final String TEMPLATE_ELEMENT_TYPE_TABLE = "Table"; 
	public static final String TEMPLATE_ELEMENT_TYPE_FREEFORM = "FreeForm"; 
	public static final String TEMPLATE_ELEMENT_TYPE_DATA = "Data"; 
	public static final String TEMPLATE_ELEMENT_TYPE_GRID = "Grid"; 
	public static final String TEMPLATE_ELEMENT_TYPE_IMAGE = "Image"; 
	public static final String TEMPLATE_ELEMENT_TYPE_LABEL = "Label"; 
	public static final String TEMPLATE_ELEMENT_TYPE_LIST = "List";