Specifies that all security roles are allowed to invoke the specified
method(s) i.e that the specified method(s) are "unchecked". It can be
specified on a class or on methods. Specifying it on the class means that
it applies to all methods of the class. If specified at the method level,
it only affects that method. If the RolesAllowed is specified at the class
level and this annotation is applied at the method level, the PermitAll
annotation overrides the RolesAllowed for the specified method.