Change member profile updates to use a fixed update form instead of dynamic.
Dynamic form was trying to be a bit too clever, whilst working on #328 (closed) the fields appeared out of order. With a fixed form this is a fixed order. The ability to change required/optinal is still available within the model.
Partially reverts 78ba3bef
Rename DynamicUpdateProfile and associated names to MemberProfileUpdate in line with convention.
Update tests to reflect these changes.
Closes #328 (closed)