[FIX] skip _notify_alive and _purge_dead_worker when the models are not yet in the registry/pooler
[FIX] skip _notify_alive and _purge_dead_worker when the models are not yet in the registry/pooler

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