Set client module __version__

According to PEP 396, the version of client library
should be set in xxxclient.__version__, that help
python-openstackclient command "module list" to get
the right plugin module versions.

Change-Id: Iebb5bd1c8332c5628a8ebc05b1e89248a2d1a7c9
Partial-Bug: #1662058

saharaclient/__init__.py

@@ -0,0 +1,19 @@
+#   Copyright 2017 Huawei, Inc. All rights reserved.
+#
+#   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 saharaclient import version
+
+
+__version__ = version.version_info.version_string()

saharaclient/tests/unit/test_base.py

@@ -12,6 +12,7 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
+import saharaclient
 from saharaclient.api import base as api_base
 from saharaclient.tests.unit import base
 
@@ -26,3 +27,6 @@ class BaseTest(base.BaseTestCase):
 
         res = api_base.get_query_string({'opt1': 2}, limit=None, marker=3)
         self.assertEqual("?marker=3&opt1=2", res)
+
+    def test_module_version(self):
+        self.assertTrue(hasattr(saharaclient, '__version__'))