Display query params in OPTIONS request to API 2 endpts
Display query params in OPTIONS request to API 2 endpts

This simple addition extends list of messages visible with OPTIONS
request to `export-instructors` and `export-members`. Now the
advanced filtering options are visible to the users.

vahtras/amy,pbanaszkiewicz/amy,pbanaszkiewicz/amy,swcarpentry/amy,swcarpentry/amy,pbanaszkiewicz/amy,vahtras/amy,swcarpentry/amy,vahtras/amy