Add `isMemberOf` attribute for Manifest group delivery

composer.json

composer.lock

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

...wphps/preauth/FederatedPreauthUserDetailsProviderTest.php

...sc/doit/uwphps/preauth/PreauthUserDetailsProviderTest.php

src/test/resources/localuser.json