Unskipped object storage test

The bug #1097137 got expired and I couldn't reproduce it.

Change-Id: Ie78e637691fdce3ae7bb7f0e5570e31efff31166
diff --git a/tempest/api/object_storage/test_object_services.py b/tempest/api/object_storage/test_object_services.py
index f7d2f88..2b8feef 100644
--- a/tempest/api/object_storage/test_object_services.py
+++ b/tempest/api/object_storage/test_object_services.py
@@ -298,7 +298,6 @@
                           self.container_name, object_name,
                           metadata=self.custom_headers)
 
-    @testtools.skip('Until Bug #1097137 is resolved.')
     @attr(type='gate')
     def test_get_object_using_temp_url(self):
         # access object using temporary URL within expiration time