[516520] Avoid unnecessary notifications of comparison model

The generated code of EMF generally uses eNotificationRequired() to
guard the creation and sending of notifications. The hand-written "Spec"
classes should use this same pattern.

Bug: 516520
Change-Id: I85a642475ea3ec6398fbc9832e58a7048ff5b804
Signed-off-by: Philip Langer <planger@eclipsesource.com>
7 files changed