[CommunicationDiagram][SiriusDiagram] Dropping a Class on a Lifeline should update the existing property instead of create a new one

Bugzilla Link	582144
Status	NEW
Importance	P3 normal
Reported	Jun 29, 2023 07:42 EDT
Modified	Jun 29, 2023 07:42 EDT
Version	0.7.0

Description

Papyrus Sirius Diagram proposes to create the property Lifeline#represents by dropping a Class on the Lifeline. This behavior is the expected one.
But, when we drop a second Class on the Lifeline, a second Property is created instead of updating the first one. This behavior should be fixed.