stepreporter: deprecate it

The StepReporter should be replaced by the StepLogger and basicConfig
from labgrid.logging. It uses the python logging infrastructure and a
better output formatting.

Signed-off-by: Rouven Czerwinski <r.czerwinski@pengutronix.de>

labgrid/stepreporter.py

@@ -16,6 +16,15 @@ def __init__(self):
     @classmethod
     def start(cls):
         """starts the StepReporter"""
+        from warnings import warn
+        warn(
+            """
+            StepLogger is deprecated, use the StepLogger and basicConfig from labgrid.logging
+            instead which integrates with the python logging infrastructure.
+            """,
+            DeprecationWarning,
+            stacklevel=2,
+        )
         assert not cls._started
         steps.subscribe(cls.notify)
         cls._started = True