change name of read_hw_status method in sequencer mixin

change name to 'readHwStatus'
needed after commit "check for bad read* and write_* methods"

Change-Id: I27467aa2a3a3bb0db5f418c99f2d2065390a190a
Reviewed-on: https://forge.frm2.tum.de/review/c/sine2020/secop/playground/+/27394
Tested-by: Jenkins Automated Tests <pedersen+jenkins@frm2.tum.de>
Reviewed-by: Enrico Faulhaber <enrico.faulhaber@frm2.tum.de>
Reviewed-by: Markus Zolliker <markus.zolliker@psi.ch>

secop/lib/sequence.py

@@ -137,8 +137,8 @@ class SequencerMixin:
             if self._seq_fault_on_stop:
                 return self.Status.ERROR, self._seq_stopped
             return self.Status.WARN, self._seq_stopped
-        if hasattr(self, 'read_hw_status'):
-            return self.read_hw_status()
+        if hasattr(self, 'readHwStatus'):
+            return self.readHwStatus()
         return self.Status.IDLE, ''
 
     def stop(self):