fix tests from mlz repo

- fix omit_unchanged
- names too short
+ other pylint complains
Change-Id: I3c277b461fad1a5fdf8e76ff1cc42b8742d1de16

Change-Id: I58fb64f91bcc2efef20df68f5c63a64315413286

test/test_iohandler.py

@@ -71,7 +71,11 @@ class Data:
 
 
 class DispatcherStub:
-    OMIT_UNCHANGED_WITHIN = 0
+    # the first update from the poller comes a very short time after the
+    # initial value from the timestamp. However, in the test below
+    # the second update happens after the updates dict is cleared
+    # -> we have to inhibit the 'omit unchanged update' feature
+    omit_unchanged_within = 0
 
     def __init__(self, updates):
         self.updates = updates
@@ -108,6 +112,7 @@ def test_IOHandler():
     group1 = Hdl('group1', 'SIMPLE?', '%g')
     group2 = Hdl('group2', 'CMD?%(channel)d', '%g,%s,%d')
 
+
     class Module1(Module):
         channel = Property('the channel', IntRange(), default=3)
         loop = Property('the loop', IntRange(), default=2)