Adds Metadata Export Test

bseeger commented 3 years ago

This adds new tests for metadata export. These tests test out the export and compares results for each field on each item to ensure that the data is exported correctly.

Tests:

Single Item Metadata Export
Single Collection Metadata Export
Search Results - Repository Item Export
Search Results - Collection Export
Round Trip test -
- this test will export a repository item, change a few fields, create a new csv file, and then ingest the new csv file. It will then export the node again and test values, ensuring that the few fields did actually change. It does look at the node's id to ensure that the ingest was an update and that it didn't create a new object.

Resolves https://github.com/jhu-idc/iDC-general/issues/329 Resolves https://github.com/jhu-idc/iDC-general/issues/327 Resolves https://github.com/jhu-idc/iDC-general/issues/330