[REF] base_external_referentials remove useless class
[REF] base_external_referentials remove useless class

hugosantosred/connector,gurneyalex/connector,esousy/connector,anybox/connector,anybox/connector,Antiun/connector,js-landoo/connector,brain-tec/connector,guewen/connector,BT-fgarbely/connector,gurneyalex/connector,open-synergy/connector,brain-tec/connector,MindAndGo/connector,Endika/connector,mohamedhagag/connector,BT-ojossen/connector,mohamedhagag/connector,fevxie/connector,brain-tec/connector,maljac/connector,zhaohuaw/connector,BT-jmichaud/connector,acsone/connector,open-synergy/connector,guewen/connector,sylvain-garancher/connector,zhaohuaw/connector,BT-fgarbely/connector,BT-jmichaud/connector,BT-ojossen/connector,fevxie/connector,hugosantosred/connector,js-landoo/connector,sylvain-garancher/connector,esousy/connector,acsone/connector,Antiun/connector,dvitme/connector,MindAndGo/connector,dvitme/connector,Endika/connector,maljac/connector,acsone/connector