Handle InstanceAlreadyExistsException at logger JMX mbeam registration

[xerial]

No description provided.

[codecov]

Codecov Report

Merging #608 into master will decrease coverage by 0.01%.
The diff coverage is 0%.

@@            Coverage Diff             @@
##           master     #608      +/-   ##
==========================================
- Coverage   81.73%   81.71%   -0.02%     
==========================================
  Files         241      241              
  Lines        8717     8719       +2     
  Branches      665      667       +2     
==========================================
  Hits         7125     7125              
- Misses       1592     1594       +2

Impacted Files	Coverage Δ
...rame-log/jvm/src/main/scala/wvlet/log/LogEnv.scala	0% <0%> (ø)	⬆️

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