test.store for Tiny tests

Full integration tests in https://github.com/CenterForDigitalHumanities/TinyNode require data creation, manipulation, and removal through the RERUM API at store.rerum.io and devstore.rerum.io.

For RERUM tests which create, manipulate, or remove data we use a different mongo collection called "annotationStoreTest". Since TinyNode and other Tiny deployments do not connect to mongo directly they have no way of using this database. They would need an RERUM endpoint available that uses this database.