[538853] Adapt EcoreTools code to this Sirius issue

The bugzilla 538853 clears diagram dependencies to Sirius custom code.
This commit adapts the EcoreTools code to these changes.
This commit will be valid as soon as EcoreTools will use a Sirius 6.2.0

Bug: 538853
Change-Id: I6da2d308d4caeeeed50e4d654d57f2b7e5205f5d
Signed-off-by: Laurent Redor <laurent.redor@obeo.fr>
1 file changed