camera_metadata: Automatically linkify tag names

Change-Id: I5f07a99765174f519e5d1187b38fd0e7ab355d3f
diff --git a/camera/docs/metadata_model.py b/camera/docs/metadata_model.py
index 9a920ab..1f615e6 100644
--- a/camera/docs/metadata_model.py
+++ b/camera/docs/metadata_model.py
@@ -204,7 +204,6 @@
     Initialize with no children. Use insert_* functions and then
     construct_graph() to build up the Metadata from some source.
     """
-
 # Private
     self._entries = []
     # kind => { name => entry }
@@ -213,6 +212,7 @@
     self._clones = []
 
 # Public (Read Only)
+    self._name = None
     self._parent = None
     self._outer_namespaces = None
     self._tags = []