MARTE11 — Timing observer naming

The GQAM chapter defines the stereotype GaTimedObs in both domain and
profile figures, however there are inconsistencies elsewhere

... GQAM sec 15.3.2.12 refers to GaTimingObserver

... SAM chapter refers to it as GaTimingObserver, in the domain figure
16.5
... and also just before Fig 16.8
... and as TimingObs, in the profile figure 16.8

...PA chapter refers to it as GaTimingObserver in profile Fig 17.7

These are due to a last minute effort to shorten the names. THey all need
to be standardized on GaTimedObs.

The domain term in chapters 15 16 17 and appendix F should be
TimedObserver, the profile term in chapters 15 16 17 should be TimedObs