Add `PreauthUserDetailsProvider` for UWMSN, large refactor

composer.json

src/main/edu/wisc/doit/uwphps/UWUserDetails.php

src/main/edu/wisc/doit/uwphps/UserDetails.php

src/main/edu/wisc/doit/uwphps/UserDetailsProvider.php

...n/edu/wisc/doit/uwphps/local/LocalUserDetailsProvider.php

...it/uwphps/preauth/FederatedPreauthUserDetailsProvider.php

...u/wisc/doit/uwphps/preauth/PreauthUserDetailsProvider.php

src/main/resources/localuser.json

...u/wisc/doit/uwphps/local/LocalUserDetailsProviderTest.php

...s/preauth/HTTPFederatedPreauthUserDetailsProviderTest.php

src/test/resources/localuser.json