Fix outlier check, broken after change in commit/author time
From: https://0xacab.org/leap/soledad/-/jobs/29633
+ scripts/benchmark/check-for-outliers.py --status-code 0 /tmp/tmp.KHN1FFHRY3
Traceback (most recent call last):
File "scripts/benchmark/check-for-outliers.py", line 170, in <module>
failed |= detect_bad_outlier(test, mean, extra)
Checking 45 test results for outliers...
File "scripts/benchmark/check-for-outliers.py", line 133, in detect_bad_outlier
mem = get_mem_stats(test)
File "scripts/benchmark/check-for-outliers.py", line 112, in get_mem_stats
buckets = data['aggregations']['commit_id_time']['buckets']
KeyError: 'aggregations'