Enforce SSE/StorageClass in PUT Object Copy

"RenameFile" is implemented in S3 using `PUT Object Copy`, which
should enforce SSE/StorageClass same way as regular `PUT Object`.

Fixes: #647

system/s3_lib.py

@@ -18,6 +18,8 @@ class S3Test(BaseTest):
     BaseTest + support for S3
     """
 
+    s3Overrides = {}
+
     def fixture_available(self):
         return super(S3Test, self).fixture_available() and s3_conn is not None
 
@@ -31,6 +33,8 @@ class S3Test(BaseTest):
             }
         }}
 
+        self.configOverride["S3PublishEndpoints"]["test1"].update(**self.s3Overrides)
+
         super(S3Test, self).prepare()
 
     def shutdown(self):