Expose AuthManager.list_projects user filter to nova-manage.

./bin/nova-manage project list admin

will now only show projects which the user 'admin' is associated with.

bin/nova-manage

@@ -386,10 +386,10 @@ class ProjectCommands(object):
         with open(filename, 'w') as f:
             f.write(rc)
 
-    def list(self):
+    def list(self, username=None):
         """Lists all projects
-        arguments: <none>"""
-        for project in self.manager.get_projects():
+        arguments: [username]"""
+        for project in self.manager.get_projects(username):
             print project.name
 
     def quota(self, project_id, key=None, value=None):