Make driver nodes mutable and regen

site_ansto/instrument/bilby/config/motors/sct_tank.tcl

@@ -300,6 +300,8 @@ proc ::scobj::tank::mkDriver { sct_controller name } {
     hsetprop ${scobj_hpath} debug_threshold 5
 # mkDriver hook code starts
    ::utility::mkVar vessel_y float user vessel_y true instrument true true
+   sicslist setatt vessel_y klass instrument
+   sicslist setatt vessel_y mutable true
 # mkDriver hook code ends
   } catch_message ]
   handle_exception ${catch_status} ${catch_message}