Tidy up logging and rework tests from scratch

tests/legacy/label_combinator_0.py

@@ -0,0 +1,30 @@
+import os, sys, importlib, glob, inspect, itertools
+
+from ffx.track_type import TrackType
+
+from ffx.track_descriptor import TrackDescriptor
+from ffx.media_descriptor import MediaDescriptor
+
+from .label_combinator import LabelCombinator
+
+
+class LabelCombinator0(LabelCombinator):
+
+    VARIANT = 'L0'
+
+    def __init__(self, context = None):
+        self._context = context
+        self._logger = context['logger']
+        self._reportLogger = context['report_logger']
+
+    def getVariant(self):
+        return LabelCombinator0.VARIANT
+
+    def getPayload(self):
+        return ''
+
+    def assertFunc(self, testObj = {}):
+        pass
+
+    def shouldFail(self):
+        return False