Fixing __reset__ method for precision

When used in the precision did not reset itself correctly, resulting in precision = 1 forall epochs > 1. @Johanmkr

Author: hzavadil98

CollaborativeCoding/metrics/precision.py

@@ -121,7 +121,8 @@ def __reset__(self):
         None
             Returns None
         """
-        self.y_true = self.y_pred = []
+        self.y_true = []
+        self.y_pred = []
         return None