improvements on PPMS and LS370

- PPMS: improved machanism for 10 K waiting
- LS370: fixed an issue with auto range
+ LS370: show test for all status bits

Change-Id: Ia6454141917893f0e5c6c4351df3a864942bb629
Reviewed-on: https://forge.frm2.tum.de/review/c/sine2020/secop/playground/+/23495
Tested-by: Jenkins Automated Tests <pedersen+jenkins@frm2.tum.de>
Reviewed-by: Markus Zolliker <markus.zolliker@psi.ch>

secop/lib/__init__.py

@@ -247,3 +247,14 @@ def getfqdn(name=''):
 
 def getGeneralConfig():
     return CONFIG
+
+
+def formatStatusBits(sword, labels, start=0):
+    """Return a list of labels according to bit state in `sword` starting
+    with bit `start` and the first label in `labels`.
+    """
+    result = []
+    for i, lbl in enumerate(labels, start):
+        if sword & (1 << i) and lbl:
+            result.append(lbl)
+    return result