Changed relations to { ht_number: ..., label: ... }
Added secondary_form superorders to superorders field
Changed secondary_form fields
Made tests selectable by TESTS environment variable (TESTS="relation superorder" rake)
Changed tests from secondary_form_note to secondary_form_preliminary_phrase
Added false case to is_secondary_form test
Updated relation test to reflect changes in mabmapper
Added additional secondary_form tests