AXIS2-6049 static serialVersionUID for Exception

[yoadey]

serialVersionUID would change every generation and won't be useful then. Also not needed for SOAP. Use static 1L as serialVersionUID for Exception. This also allows build caches to be used.

[veithen]

Looks like there is a problem with this change because tests are failing.

[codecov-commenter]

Codecov Report

Merging #384 (02669a3) into master (ecfe305) will increase coverage by 0.00%.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##           master     #384   +/-   ##
=======================================
  Coverage   42.56%   42.57%           
=======================================
  Files        1500     1500           
  Lines      115008   115011    +3     
  Branches    22586    22587    +1     
=======================================
+ Hits        48958    48968   +10     
+ Misses      58290    58284    -6     
+ Partials     7760     7759    -1     

Impacted Files	Coverage Δ
.../emitter/AxisServiceBasedMultiLanguageEmitter.java	54.70% <100.00%> (ø)
...apache/axis2/kernel/http/SOAPMessageFormatter.java	84.76% <0.00%> (+0.44%)	⬆️
...rnel/src/org/apache/axis2/builder/BuilderUtil.java	49.60% <0.00%> (+1.18%)	⬆️
...n/java/org/apache/axis2/webapp/CSRFTokenCache.java	100.00% <0.00%> (+44.44%)	⬆️

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[yoadey]

@veithen could you take a look at this PR whether it's ok and merge it if nothing is preventing it? Would help us a lot to improve build time and make more reproducable builds