Verify that pct_of_average and other trigger methods actually takes into account the total number of hits for each bucket

[daanraman]

Example:

20 x numerical value (10) + 1 x numerical value (1) should actually calculate the average of (20x10 + 1), not (10+1)

Check if this is actually the case

[detobel36]

Tested for function get_decision_frontier here https://github.com/NVISO-BE/ee-outliers/blob/master/app/tests/unit_tests/test_utils.py#L303

Test "in real" conditions here: https://github.com/detobel36/ee-outliers/blob/generatorDoc/app/tests/unit_tests/test_analyzer_metrics.py#L829 and here: https://github.com/detobel36/ee-outliers/blob/generatorDoc/app/tests/unit_tests/test_analyzer_terms.py#L264