fixes in convergence and statemachine

- set spent_inside to 0 on set_target
- additional debug log messages in statemachine

secop/lib/statemachine.py

@@ -186,6 +186,7 @@ class StateMachine:
                     ret = self.state(self)
                     self.init = False
                     if self.stopped:
+                        self.log.debug('%r', self.stopped)
                         self.last_error = self.stopped
                         self.cleanup(self)
                         self.stopped = False
@@ -268,6 +269,7 @@ class StateMachine:
             self.stopped = Restart
             with self._lock:  # wait for running cycle finished
                 if self.stopped:  # cleanup is not yet done
+                    self.log.debug('restart')
                     self.last_error = self.stopped
                     self.cleanup(self)  # ignore return state on restart
                     self.stopped = False