[wsrp] [CR307] - Add ModifyRegistrationRequired fault

[Rich Thompson <richt2@us.ibm.com>]

Document: Spec
Section: All operations that accept registrationContext
and can return InvalidRegistration fault
Requested by: Subbu Allamaraju

Old Text:
New Text: Add ModifyRegistrationRequired fault to all operations that accept
registrationContext and can return InvalidRegistration fault.

Reasoning:In the current spec, Producers can throw an InvalidRegistration
whenever current registration is invalid. However, there are situations
when the current registration is not necessarily invalid, but the Consumer
is required to modify the existing registration. The protocol currently
has no means to indicate this. This new fault will fill this gap.

Errata? no