[IMP] base_external_referential add the function get_all_extid_from_referential
[IMP] base_external_referential add the function get_all_extid_from_referential

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