limit scope of import of os, fix create namespace to not create endpoint instead

Author: Rebecca Shaw

servicedirectory/snippets.py

@@ -22,7 +22,7 @@ def create_namespace(project_id, location_id, namespace_id):
 
   client = servicedirectory_v1beta1.RegistrationServiceClient()
 
-  namespace = servicedirectory_v1beta1.Endpoint(
+  namespace = servicedirectory_v1beta1.Namespace(
       name='projects/{0}/locations/{1}/namespaces/{2}'.format(
           project_id, location_id, namespace_id))
 

servicedirectory/snippets_test.py

@@ -14,12 +14,12 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-import os
+from os import environ
 import pytest
 import snippets
 from google.cloud import servicedirectory_v1beta1
 
-PROJECT_ID = os.environ['GCLOUD_PROJECT']
+PROJECT_ID = environ['GCLOUD_PROJECT']
 LOCATION_ID = 'us-east1'
 NAMESPACE_ID = 'a-namespace'
 SERVICE_ID = 'a-service'