Add tests for testing swift slo middleware

Add test cases for Swift's Static Large Objects (SLO) feature which
supports management of a large object by using a manifest file.
Test cases contain functional tests for testing PUT, HEAD, GET
and DELETE.

Change-Id: I8cd1edb7290a76181303b1fd5b6738e9f1c157ff
Implements: blueprint test-swift-slo-middleware
Related-Bug: #1240856
diff --git a/tempest/services/object_storage/object_client.py b/tempest/services/object_storage/object_client.py
index 2fee042..9e0adff 100644
--- a/tempest/services/object_storage/object_client.py
+++ b/tempest/services/object_storage/object_client.py
@@ -15,6 +15,8 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
+import urllib
+
 from tempest.common import http
 from tempest.common.rest_client import RestClient
 from tempest import exceptions
@@ -27,13 +29,16 @@
 
         self.service = self.config.object_storage.catalog_type
 
-    def create_object(self, container, object_name, data):
+    def create_object(self, container, object_name, data, params=None):
         """Create storage object."""
 
         headers = dict(self.headers)
         if not data:
             headers['content-length'] = '0'
         url = "%s/%s" % (str(container), str(object_name))
+        if params:
+            url += '?%s' % urllib.urlencode(params)
+
         resp, body = self.put(url, data, headers)
         return resp, body
 
@@ -41,9 +46,11 @@
         """Upload data to replace current storage object."""
         return self.create_object(container, object_name, data)
 
-    def delete_object(self, container, object_name):
+    def delete_object(self, container, object_name, params=None):
         """Delete storage object."""
         url = "%s/%s" % (str(container), str(object_name))
+        if params:
+            url += '?%s' % urllib.urlencode(params)
         resp, body = self.delete(url)
         return resp, body