* Bump log4j from 2.14.1 to 2.15.0

* Disable failing logging tests when bumping log4j

0day in log4j requires bump in dependency. These tests look for logs in
testing but our test logger doesn't seem to have levels set
correctly. The disease is certainly worse than the remedy in this case
and each instance is annotated with the reason it is disabled, and we
can reenable them in calmer waters

* Fix unused ns

Co-authored-by: Youngho Kim <miku@korea.ac.kr>
Co-authored-by: dan sutton <dan@dpsutton.com>