Support to change the default exception mapping

[boretti]

Links

Name	References
Related issues	#66
Related PR

Summary

Add support to register default exception mapping.

[codecov]

Codecov Report

Merging #67 into master will not change coverage.
The diff coverage is 100%.

@@           Coverage Diff           @@
##             master    #67   +/-   ##
=======================================
  Coverage       100%   100%           
- Complexity      639    647    +8     
=======================================
  Files            56     56           
  Lines           994   1006   +12     
  Branches          1      1           
=======================================
+ Hits            994   1006   +12

Flag	Coverage Δ	Complexity Δ
#unitlinuxopenjdk10	100% <100%> (ø)	647 <9> (+8)	⬆️
#unitlinuxoraclejdk9	100% <100%> (ø)	647 <9> (+8)	⬆️

Impacted Files	Coverage Δ	Complexity Δ
...werunit/extensions/exceptions/ExceptionMapper.java	100% <100%> (ø)	19 <7> (+7)	⬆️
.../ch/powerunit/extensions/exceptions/Constants.java	100% <100%> (ø)	16 <1> (+1)	⬆️
...extensions/exceptions/ExceptionHandlerSupport.java	100% <100%> (ø)	2 <1> (ø)	⬇️

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