Refactor test modules

Renamed test directory to tests to be consistent with other OpenStack
client projects.

Renamed some modules to match the pattern of test_<name of module under
test>.py

Change-Id: Ibdf25b4d4c229e417e428420bacb9419f8e4c5fc

barbicanclient/tests/test_barbican.py

@@ -22,8 +22,8 @@ import testtools
 import uuid
 import json
 
-from barbicanclient.test import keystone_client_fixtures
-from barbicanclient.test import test_client
+from barbicanclient.tests import keystone_client_fixtures
+from barbicanclient.tests import test_client
 import barbicanclient.barbican
 
 

barbicanclient/tests/test_containers.py

@@ -18,7 +18,7 @@ import json
 import mock
 from oslo_utils import timeutils
 
-from barbicanclient.test import test_client
+from barbicanclient.tests import test_client
 from barbicanclient import base, containers, secrets
 
 

barbicanclient/tests/test_orders.py

@@ -19,8 +19,8 @@ from oslo_utils import timeutils
 import testtools
 
 from barbicanclient import orders, base
-from barbicanclient.test import test_client
-from barbicanclient.test import test_client_secrets as test_secrets
+from barbicanclient.tests import test_client
+from barbicanclient.tests import test_secrets
 
 
 class OrdersTestCase(test_client.BaseEntityResource):

barbicanclient/tests/test_secrets.py

@@ -17,7 +17,7 @@ import json
 
 from oslo.utils import timeutils
 
-from barbicanclient.test import test_client
+from barbicanclient.tests import test_client
 from barbicanclient import secrets, base