fix remote auth backend check

Author: rmanyari

netbox/netbox/api/authentication.py

@@ -60,7 +60,7 @@ def authenticate_credentials(self, key):
 
         user = token.user
         # When LDAP authentication is active try to load user data from LDAP directory
-        if settings.REMOTE_AUTH_BACKEND == 'netbox.authentication.LDAPBackend':
+        if 'netbox.authentication.LDAPBackend' in settings.REMOTE_AUTH_BACKEND:
             from netbox.authentication import LDAPBackend
             ldap_backend = LDAPBackend()