Enh: factorized a check_objects_from() helper function and use it
Enh: factorized a check_objects_from() helper function and use it

titilambert/alignak,gst/alignak,Alignak-monitoring/alignak,titilambert/alignak,gst/alignak,titilambert/alignak,gst/alignak,gst/alignak,titilambert/alignak,Alignak-monitoring/alignak