Changes

Bug 542515 - [MARTE] change multiplicity of base properties to 0..1 (in
uml and ecore files) should regenerate code since 2 changes occurs when
changing property multiplicity
* @model required="true" **/ is removed : property is no longer required 
if lower bound =0
* some PackageImpl are modified : how to initialize properties : lower 
bound no longer = 1
Change-Id: I5e662a3767fe25b5e4260f772d47e2479845b8b0 Signed-off-by: Asma
Smaoui <asma.smaoui@cea.fr>