[Fix #1479] Task to clean invalid emails

lib/tasks/2018_02_28_clean_gestionnaire_emails.rake

@@ -0,0 +1,11 @@
+namespace :'2018_02_28_clean_invalid_emails_accounts' do
+  task clean: :environment do
+    Gestionnaire.pluck(:email, :id).select { |e, id| e.include?(" ") }.each do |email, id|
+      Gestionnaire.find_by(id: id, current_sign_in_at: nil).try(:destroy) # ensure account was never used
+    end
+
+    User.pluck(:email, :id).select { |e, id| e.include?(" ") }.each do |email, id|
+      User.find_by(id: id, current_sign_in_at: nil).try(:destroy) # ensure account was never used
+    end
+  end
+end