add job dependent nullify integration test
add leadership dependent nullify integration test
make sure leadership roles become available if a user is removed from the database
Merge branch 'master' of https://github.com/epicodus/chicktech

Making sure master is up to date before merging with branches
Merge branch 'master' into job_dependent_nullify

Making sure there are no conflicts between this branch and master
Merge branch 'master' into leader_dependent_nullify

Making sure master plays nice with this branch.