signals.py: small code simplification
signals.py: small code simplification

Mirantis/solar,openstack/solar,openstack/solar,loles/solar,pigmej/solar,zen/solar,loles/solar,loles/solar,Mirantis/solar,pigmej/solar,zen/solar,zen/solar,pigmej/solar,torgartor21/solar,zen/solar,Mirantis/solar,torgartor21/solar,openstack/solar,loles/solar,Mirantis/solar