Add member controller tests

[xstrengthofonex]

Purpose of Changes

fixes #2

Description of Changes

Added tests for MemberController using mockMvc and BDDMockito.

Checklist

• [x ] My changes have automated tests
• [ x] I tested my changes interactively
• [ ] I included docstrings
• [ x] My changes can't reasonably be split into smaller PRs

[xstrengthofonex]

Thank you! I'll try and write a few more tests for the other modules when I have time.