ctf: add missing types

Change-Id: Ied093d7edf0e7de76e0dc637699711cf0653dc6b
Signed-off-by: Matthew Khouzam <matthew.khouzam@ericsson.com>

Author: MatthewKhouzam

ctf/org.eclipse.tracecompass.ctf.core/src/org/eclipse/tracecompass/internal/ctf/core/utils/JsonMetadataStrings.java

@@ -43,6 +43,17 @@ private JsonMetadataStrings() {
      */
     public static final String FRAGMENT_FIELD_ALIAS = "field-class-alias"; //$NON-NLS-1$
 
+    /**
+     * The field class
+     */
+    public static final String FIELD_CLASS = "field-class"; //$NON-NLS-1$
+
+    /**
+     * The name of the fragment
+     */
+    public static final String NAME = "name"; //$NON-NLS-1$
+
+
     /**
      * Type string for a CTF2 clock class fragment
      */