fixes on HasConvergence and HasOutputModule

- HasConvergence must inherit from HasStates
- control_active should have a default

Change-Id: Ic8b430003fdb746bf76782b74fa04e43c700c2e2
Reviewed-on: https://forge.frm2.tum.de/review/c/secop/frappy/+/31023
Tested-by: Jenkins Automated Tests <pedersen+jenkins@frm2.tum.de>
Reviewed-by: Markus Zolliker <markus.zolliker@psi.ch>

frappy_psi/convergence.py

@@ -21,10 +21,11 @@
 # *****************************************************************************
 
 from frappy.core import Parameter, FloatRange, BUSY, IDLE, WARN
+from frappy.states import HasStates
 from frappy.lib.statemachine import StateMachine, Retry, Stop
 
 
-class HasConvergence:
+class HasConvergence(HasStates):
     """mixin for convergence checks
 
     Implementation based on tolerance, settling time and timeout.