Multiple API version support

* Use multiple entry point groups to represent each API+version
  combination supported
* Add some tests

Try it out:
* Right now only '* user' commands have multiple overlapping versions;
  you can see the selection between v2.0 and v3 by looking at the
  command help output for 'tenant' vs 'project':

  os --os-identity-api-version=2.0 help set user
  os --os-identity-api-version=3 help set user

Change-Id: I7114fd246843df0243d354a7cce697810bb7de62

1 files changed, 0 insertions, 35 deletions

diff --git a/tests/test_clientmanager.py b/tests/test_clientmanager.py
deleted file mode 100644
index fe99c599..00000000
--- a/tests/test_clientmanager.py
+++ /dev/null
@@ -1,35 +0,0 @@
-#   Copyright 2012-2013 OpenStack, LLC.
-#
-#   Licensed under the Apache License, Version 2.0 (the "License"); you may
-#   not use this file except in compliance with the License. You may obtain
-#   a copy of the License at
-#
-#        http://www.apache.org/licenses/LICENSE-2.0
-#
-#   Unless required by applicable law or agreed to in writing, software
-#   distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
-#   WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
-#   License for the specific language governing permissions and limitations
-#   under the License.
-#
-
-from openstackclient.common import clientmanager
-from tests import utils
-
-
-class Container(object):
-    attr = clientmanager.ClientCache(lambda x: object())
-
-    def __init__(self):
-        pass
-
-
-class TestClientManager(utils.TestCase):
-    def setUp(self):
-        super(TestClientManager, self).setUp()
-
-    def test_singleton(self):
-        # NOTE(dtroyer): Verify that the ClientCache descriptor only invokes
-        # the factory one time and always returns the same value after that.
-        c = Container()
-        self.assertEqual(c.attr, c.attr)