Election for Glenn Plouhinec as Committer on Eclipse Sirius

Glenn has contributed quite a few fixes and improvements in the last few months, and is now an active member of the team:
* ba235f5d0 [test] Fix test KO due to migration participant
* a46819263 [570518] Repair rectilinear Edges with less than two bendpoints
* 524a434c1 [570518] Add migration participant to repair Edges with one Bendpoint
* 3c9d04533 [571115] VSM validation rule for conflicting CellEditor and EditLabel
* e8dc80887 [571115] Add documentation for CellEditor tool
* 87186e29a [571214] Comment unreliable Representations Links SWTBot tests
* 19eb38adb [571214] Fix RemoveBendpoints command with rectilinear NoteAttachment
* 86634da6b [570518] Add tests with Representation Link and Text
* ac59fa3ba [570518] Add missing bendpoints in NoteAttachment
* b6bc36523 [570518] Ignore the labels in Bendpoint computation
* 2c84b7c43 [releng] Move to Acceleo-3.7 R202102190929 release.
* 08fa70f91 [570957] Correct the filter of DRepresentationChangeListener
* 75a9ebc88 [569386] ClassCastException when deleting elements linked to note
* 9bc440b1c [debug] Improves the "Show Figures" feature for all IGraphicalEditPart
* dd136b30d [568394] Add helper in SWTBotUtils to expand ExpandableComposite