Fix test for transform registry.
Fix test for transform registry.

In 24016ce74afc83b18197c89f95d260b388e6e309, the value of
transform.validators was changed from a list to an OrderedDict.

Update the tests to reflect this change.

cathydeng/openelections-core,openelections/openelections-core,cathydeng/openelections-core,datamade/openelections-core,datamade/openelections-core,openelections/openelections-core