Remove unstable_test decorator

Removing unstable_test decorator from
test_create_object_with_transfer_encoding method.

The test seems to be passing in most of the jobs,
therefore there is no need to have the decorator anymore.

Related-Bug: #1905432
Closes-Bug: #1905432
Change-Id: Iad12907914148b4185f4620dd5607b7d2aa09a02
1 file changed