LdapService & LdapPerson Improvements

[cnrudd]

🎁 New Features

• LdapService searchOne and searchMany methods have been made public.
• LdapPerson class now includes displayName, givenname, and sn fields.

🐞 Bug Fixes

• LdapPerson class email key changed to mail to match LDAP attribute.

This branch's changes have been tested in a client app that needed these changes.

[lbwexler]

Nice! Will adjust changelog in develop