add radius-server role

radius-server/defaults/main.yml

radius-server/handlers/main.yml

radius-server/tasks/main.yml

radius-server/templates/clients.conf.j2

radius-server/templates/mods-available/eap.j2

radius-server/templates/mods-available/ldap.j2

radius-server/templates/mods-available/mschap.j2

radius-server/templates/mods-available/ntlm_auth.j2

radius-server/templates/mods-available/realm.j2

radius-server/templates/mods-config/files/authorize.j2

radius-server/templates/policy.d/ntlm_auth.j2

radius-server/templates/policy.d/rewrite_station_to_ssid.j2

radius-server/templates/proxy.conf.j2

radius-server/templates/sites-available/default.j2

radius-server/templates/sites-available/inner-tunnel.j2