Testing revamp, data issues, permissions on contributors 

This PR solves

#321 seed data contributors and mary and joe are now visible to guests.
#334 account details for mary show up now
#313 reputation interaction with tests
#311 mary's reputation
#291 new check in dbteardown
#223 side effects are down to a minimum

This PR doesn't change any behavior, but there are changes to data you may have to adjust end-to-end assertions.