Alter test_blah to be work with iso8601 > 0.1.8
Alter test_blah to be work with iso8601 > 0.1.8

- Alter test_blah to be compatible with versions of the iso8601 module >
  0.1.8. It has become stricter in what it accepts from version 0.1.9 and
  so raises its own exception before our InvalidRecordException can be
  reached.

apel/apel,stfc/apel,tofu-rocketry/apel,apel/apel,stfc/apel,tofu-rocketry/apel