MARTE11 — Align notions of duration in NFP, Time and GQAM

The Time profile is suposed to provide a fundational timing model for MARTE. Time stereotypes are specialized in several of profiles, such as GRM and GQAM. However, while time-related notions in the analysis profiles are typed by NFP_Duration, the Time::TimedProcesssing.duration stereotype attribute is typed by a ValueSpecification. This type inconsitency makes between general and specialized concepts creates usability issues. Indepently of that, note that the TimedProcessing meta-class and stereotype attribute are not consistently typed, as the (normative) TimedProcessing.duration meta-class attribute is typed by the (non-normative) CVS::DurationValueSpecification.

Disposition: See issue 14903 for disposition