Bug 532186 - [IoTML] Provide a first diagram

Provide an IoTML Composite diagram with
 - palette with VirtualEntity, DigitalArtefact and ServiceDescription
 - diagrammatic element type in iotmldi-gen.elementtypesconfigurations
 - validation for all model in ModelValidationTest

Change-Id: Id875b3e66408b0ed42bf5ab9722687ba2dcb84ed
Signed-off-by: Benoit Maggi <benoit.maggi@cea.fr>
5 files changed