SEC14 — Need TaggedComponentList typedef.

There is a requirement to pass a sequence of IOP::TaggedComponents between
interfaces of different modules, namely SecurityReplaceable and Portable
Interceptors.

We would like to see a typedef in module IOP of:

module IOP

;

Due to different language mappings and the way they handle typdefs, a
definition in a common place is needed instead of having each module
define their own typedef for a sequence<IOP::TaggedComponent> as this
approach would provide for a difficult hand-off for the type.