Metamodel changes

From Capella 5.x to 6.x

Modification of all NSURI

• http://www.polarsys.org/capella/core/.../5.0.0 to http://www.polarsys.org/capella/core/.../6.0.0
• http://www.polarsys.org/capella/common/.../6.0.0 to http://www.polarsys.org/capella/common/.../6.0.0