Fix test_keys_and_vals_to_strs dict assert
Fix test_keys_and_vals_to_strs dict assert

Fix the assert of dictionary equality in test_keys_and_vals_to_strs
as the dictionary order can cause the test to fail.

Change-Id: Iaa0c7bf6cbcb456451d287c7ba8d9e2829e4edc5
Closes-Bug: #1532834

openstack/python-magnumclient