setting _task_iti_delays to -1 (NOT SET) as outcome nearly always = 0

Author: GaelleChapuis

ibllib/qc/task_metrics.py

@@ -85,8 +85,7 @@ class TaskQC(base.QC):
                          TaskQC._thresholding(x, thresholds={"PASS": 0.99, "WARNING": 0}),
                          '_task_stimOff_delays': lambda x:
                          TaskQC._thresholding(x, thresholds={"PASS": 0.99, "WARNING": 0}),
-                         '_task_iti_delays': lambda x:
-                         TaskQC._thresholding(x, thresholds={"PASS": 0.99, "WARNING": 0}),
+                         '_task_iti_delays': lambda x: -1,  # TODO figure why nearly always = 0 ;
                          '_task_stimFreeze_delays': lambda x:
                          TaskQC._thresholding(x, thresholds={"PASS": 0.99, "WARNING": 0}),
                          '_task_wheel_integrity': lambda x: