[Fix #1479] Sanitize Gestionnaire email before validation

app/models/gestionnaire.rb

@@ -1,9 +1,14 @@
 class Gestionnaire < ApplicationRecord
+  include CredentialsSyncableConcern
+  include EmailSanitizableConcern
+
   devise :database_authenticatable, :registerable,
     :recoverable, :rememberable, :trackable, :validatable
 
   has_and_belongs_to_many :administrateurs
 
+  before_validation -> { sanitize_email(:email) }
+
   has_many :assign_to, dependent: :destroy
   has_many :procedures, through: :assign_to
   has_many :dossiers, -> { state_not_brouillon }, through: :procedures
@@ -12,8 +17,6 @@ class Gestionnaire < ApplicationRecord
   has_many :avis
   has_many :dossiers_from_avis, through: :avis, source: :dossier
 
-  include CredentialsSyncableConcern
-
   def visible_procedures
     procedures.publiees_ou_archivees
   end