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 FORMAT_TYPE_PDF = "pdf"; 
	public static final String FORMAT_TYPE_RTF = "rtf"; 
	public static final String FORMAT_TYPE_REPORTLET = "reportlet"; 
	public static final String FORMAT_TYPE_EXCEL = "excel"; 
	public static final String FORMAT_TYPE_WORD = "word"; 
	public static final String FORMAT_TYPE_POWERPOINT = "powerpoint"; 	
	public static final String FORMAT_TYPE_DOC = "doc"; 
	/**
	 * ImageRefType -- The image reference type. The first constant is the name
	 * of ImageRefType choice. The followed constants are valid choice values of
	 * ImageRefType.
	 */
	public static final String CHOICE_IMAGE_REF_TYPE = "imageRefType"; 
	public static final String IMAGE_REF_TYPE_NONE = "none"; 
	public static final String IMAGE_REF_TYPE_FILE = "file"; 
	public static final String IMAGE_REF_TYPE_URL = "url"; 
	public static final String IMAGE_REF_TYPE_EXPR = "expr"; 
	public static final String IMAGE_REF_TYPE_EMBED = "embed"; 
	/**
	 * propertyMaskType -- The choice for the property mask. The first constant
	 * is the name of propertyMaskType choice. The followed constants are valid
	 * choice values of propertyMaskType.
	 */
	public static final String CHOICE_PROPERTY_MASK_TYPE = "propertyMaskType"; 
	public static final String PROPERTY_MASK_TYPE_CHANGE = "change"; 
	public static final String PROPERTY_MASK_TYPE_LOCK = "lock"; 
	public static final String PROPERTY_MASK_TYPE_HIDE = "hide"; 
	/**
	 * scalarParamAlign -- The choice for the scalarParamter alignment. The
	 * first constant is the name of scalarParamAlign choice. The followed