Only change collation for functional tests

The unconditional module-level change of the locale collation can
affect other tests run under nose. To avoid this, make the change at
the package level, and restore it when finished.

Change-Id: Iacda42aa7155f1cfa7d0dcadbf73b961dfb4b923

test/functional/__init__.py

@@ -0,0 +1,32 @@
+# Copyright (c) 2014 OpenStack Foundation
+#
+# 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.
+
+import locale
+
+
+config = {}
+orig_collate = ''
+
+
+def setup_package():
+    global orig_collate
+    orig_collate = locale.setlocale(locale.LC_COLLATE)
+    global config
+    locale.setlocale(locale.LC_COLLATE, config.get('collate', 'C'))
+
+
+def teardown_package():
+    global orig_collate
+    locale.setlocale(locale.LC_COLLATE, orig_collate)

test/functional/tests.py

@@ -29,12 +29,13 @@ import uuid
 from nose import SkipTest
 
 from test import get_config
+from test.functional import config
 from test.functional.swift_test_client import Account, Connection, File, \
     ResponseError
 from swift.common import constraints
 
 
-config = get_config('func_test')
+config.update(get_config('func_test'))
 for k in constraints.DEFAULT_CONSTRAINTS:
     if k in config:
         # prefer what's in test.conf
@@ -60,8 +61,6 @@ def load_constraint(name):
         raise SkipTest(c)
     return c
 
-locale.setlocale(locale.LC_COLLATE, config.get('collate', 'C'))
-
 
 def chunks(s, length=3):
     i, j = 0, length