Add unit tests for admin adding user
Add unit tests for admin adding user

heartsucker/securedrop,ageis/securedrop,ehartsuyker/securedrop,micahflee/securedrop,ehartsuyker/securedrop,ageis/securedrop,conorsch/securedrop,conorsch/securedrop,ehartsuyker/securedrop,garrettr/securedrop,ehartsuyker/securedrop,micahflee/securedrop,ageis/securedrop,ehartsuyker/securedrop,garrettr/securedrop,garrettr/securedrop,heartsucker/securedrop,ageis/securedrop,conorsch/securedrop,ehartsuyker/securedrop,heartsucker/securedrop,conorsch/securedrop,heartsucker/securedrop,garrettr/securedrop,micahflee/securedrop,heartsucker/securedrop,micahflee/securedrop,conorsch/securedrop