Add log with test scenario number

This makes it easier to identify which scenario is being currently
tested then running the test with logs enabled and looking at the logs.

Signed-off-by: Leandro Lucarella <[email protected]>

Author: llucax

tests/timeseries/_battery_pool/test_battery_pool.py

@@ -278,6 +278,7 @@ async def run_scenarios(
         AssertionError: If received metric is not as expected.
     """
     for idx, scenario in enumerate(scenarios):
+        _logger.info("Testing scenario: %d", idx)
         # Update data stream
         old_data = streamer.get_current_component_data(scenario.component_id)
         new_data = replace(old_data, **scenario.new_metrics)