Change pypi.appspot.com to b.pypi.python.org in the tests, as pypi.appspot.com...

Change pypi.appspot.com to b.pypi.python.org in the tests, as pypi.appspot.com is gone and the site owner was annoyed with all the testing requests ;)

tests/test_config.py

@@ -23,13 +23,13 @@ def test_command_line_options_override_env_vars():
 
     """
     environ = clear_environ(os.environ.copy())
-    environ['PIP_INDEX_URL'] = 'http://pypi.appspot.com/'
+    environ['PIP_INDEX_URL'] = 'http://b.pypi.python.org/simple/'
     reset_env(environ)
     result = run_pip('install', '-vvv', 'INITools', expect_error=True)
-    assert "Getting page http://pypi.appspot.com/INITools" in result.stdout
+    assert "Getting page http://b.pypi.python.org/simple/INITools" in result.stdout
     reset_env(environ)
     result = run_pip('install', '-vvv', '--index-url', 'http://download.zope.org/ppix', 'INITools', expect_error=True)
-    assert "http://pypi.appspot.com/INITools" not in result.stdout
+    assert "b.pypi.python.org" not in result.stdout
     assert "Getting page http://download.zope.org/ppix" in result.stdout