MARTE — automotive example

The automotive example still uses stereotypes that have been renamed in the lastest versions of the document (e.g. <<msgPort>> instead of <<messagePort>>, <<serviceSpecification>> and <<signalSpecification>> instead of <<bFeatureSpecification>>). Such inconsistencies appear in diagrams and descriptions.

1) Remove references to the msgPort stereotype and replace by the messagePort stereotype.
2) Remove references to the serviceSpecification and signalSpecification and replace by the bFeatureSpecification stereotype.