axis: added a configuration option to not check discrepancy.

bliss/common/axis.py

@@ -1698,7 +1698,9 @@ class Axis:
         check_encoder = (
             self.config.get("check_encoder", bool, self.encoder) and self.encoder
         )
-        check_discrepancy = not (read_encoder_position and not check_encoder)
+        check_discrepancy = self.config.get("check_discrepancy", bool, True) and (
+            not (read_encoder_position and not check_encoder)
+        )
         if check_discrepancy and abs(dial_initial_pos - hw_pos) > self.tolerance:
             raise RuntimeError(
                 "%s: discrepancy between dial (%f) and controller position (%f), aborting"