MULTIREF OE Enhancements

[keithbauer]

Description

• Add a new url parameter, age_group, to pass to the client on login
• Add a relevance ordering facet
• Add the query parameter q to the facet urls

Motivation and Context

• OE-940 Pass a user's age group to the client on login
• OE-965 Add query parameter to search facetLinks

How Has This Been Tested?

Manually and unit tests

Checklist:

• [ ] I have updated the documentation accordingly.
• [x] All new and existing tests passed.