rlib2: Set tag operation param “name” to None for cluster tags

Otherwise parameter verification in the master daemon fails.

Signed-off-by: Michael Hanselmann <hansmi@google.com>
Reviewed-by: Iustin Pop <iustin@google.com>

lib/rapi/rlib2.py

@@ -1122,10 +1122,10 @@ class _R_Tags(baserlib.R_Generic):
     """
     baserlib.R_Generic.__init__(self, items, queryargs, req)
 
-    if self.TAG_LEVEL != constants.TAG_CLUSTER:
-      self.name = items[0]
+    if self.TAG_LEVEL == constants.TAG_CLUSTER:
+      self.name = None
     else:
-      self.name = ""
+      self.name = items[0]
 
   def GET(self):
     """Returns a list of tags.