webui: add mangedby tab to otptoken

Added managedby_user tab to manage users who can manage the token.

https://fedorahosted.org/freeipa/ticket/5003

Reviewed-By: Martin Babinsky <mbabinsk@redhat.com>

install/ui/src/freeipa/otptoken.js

@@ -221,6 +221,12 @@ return {
                     ]
                 }
             ]
+        },
+        {
+            $type: 'association',
+            name: 'managedby_user',
+            add_method: 'add_managedby',
+            remove_method: 'remove_managedby'
         }
     ],