Inject the project name into each projects groups.

For CrOS, we have scenarios were people checkout a smaller version
of our manifest via groups, and enable individual repositories as
needed for their work.  Previously this was via local_manifest
manipulation, which breaks via manifest-groups would require a
remove-project tag.

Via injecting the projects name into the projects groups, this
allows us to instead manipulate the configured groups allowing
the user to turn on/off projects as necessary.

Change-Id: I07b7918e16cc9dc28eb47e19a46a04dc4fd0be74

manifest_xml.py

@@ -566,8 +566,9 @@ class XmlManifest(object):
     if node.hasAttribute('groups'):
       groups = node.getAttribute('groups')
     groups = [x for x in re.split('[,\s]+', groups) if x]
-    if 'default' not in groups:
-      groups.append('default')
+
+    default_groups = ['default', 'name:%s' % name, 'path:%s' % path]
+    groups.extend(set(default_groups).difference(groups))
 
     if self.IsMirror:
       relpath = None