write test for correct # of resumption token calls

[erinspace]

We had a bug on staging that prevented the resumption token from being used, meaning we only collected the first set of records from any query.

Write a test that uses a VCR recorded using a certain number of resumption tokens, and make sure that the correct number of calls is made! Or, a API call to an OAI PMH provider that we know returns more than 100 records, and make sure that number of records is collected.