Karate: Export MARC authority records

Write Karate tests.

Requirements

• Export is available via MARC authority app (see rough mockup) 
• Will use Data Export app 
• Same workflow as exporting MARC bib and MARC holdings via Inventory app
  • User will be able to select the MARC authority records to export
  • Export format will be .mrc
• Identify a recommended export record limit. This limit should be based on no significant performance degradation.
• See current export MARC instance records workflow. Screencast attached. [^Recording #61.mp4]

Rough mockup