Adapt sim_* cfg's to current syntax

+ make 'limit' usable as type in cfg files
+ minor fixes

Change-Id: Ib94b2645c7a0d978d64d4c86c4415d4b5b0d485f
Reviewed-on: https://forge.frm2.tum.de/review/c/sine2020/secop/playground/+/21485
Tested-by: Enrico Faulhaber <enrico.faulhaber@frm2.tum.de>
Tested-by: JenkinsCodeReview <bjoern_pedersen@frm2.tum.de>
Reviewed-by: Enrico Faulhaber <enrico.faulhaber@frm2.tum.de>

secop/lib/sequence.py

@@ -153,7 +153,7 @@ class SequencerMixin:
             self._seq_error = str(e)
         finally:
             self._seq_thread = None
-            self.poll(0)
+            self.pollParams(0)
 
     def _seq_thread_inner(self, seq, store_init):
         store = Namespace()