Fix defininition of VSMElementCustomizationReuse in viewpoint.ecore

One of the patches reported manually from the previous code base broke
the definition of that class.

Change-Id: I358d90bb8f310ea5b00d72b72362565aaa82b80c
Signed-off-by: Pierre-Charles David <pierre-charles.david@obeo.fr>
Report recent code changes from the previous code base.

This integrates changes made in the previous code base (viewpoint.git)
since the Sirius code was contributed.

It covers
     commit c6c8ffa666d94642e7252684d8ce8017c9fc6998
through
     commit e0a137c07e44e85b7e285bd36089f42b97d412c1
     
There is a mistake in the previous "Report recent code changes" commit.
The through commit is c6c8ffa666d94642e7252684d8ce8017c9fc6998.

Change-Id: If9382e6e729a0e83193e6724bb1d1bc6eb0c4fdd
Signed-off-by: Laurent Redor <laurent.redor@obeo.fr>
Adapt isFromSirius after namespace change

fix isFromSirius which would never return true as
it was checking for the "viewpoint" name in the
package namespace of an Object.

Now checks the namespace starts with org.eclipse.sirius

Change-Id: I78a816000eafa5399f60ecb03fe7a7b2a1857838
[419926] Fix rebranding errors in ViewpointSelection.

Change-Id: I5e2b5cd37924b6f21442fc2b1d791ff80186a383
Signed-off-by: Pierre-Charles David <pierre-charles.david@obeo.fr>