Convert XmlUtils to injectable collaborator

[dseurotech]

Converts XMLUtil to a non-static class, built based on a JAXBContextProvider (without the need to set one on the fly).

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 12.79070% with 150 lines in your changes are missing coverage. Please review.

Project coverage is 21.01%. Comparing base (81a090d) to head (d24f583). Report is 2 commits behind head on develop.

:exclamation: Current head d24f583 differs from pull request most recent head 0db707f. Consider uploading reports for the commit 0db707f to get more accurate results

Additional details and impacted files

@@              Coverage Diff              @@
##             develop    #4000      +/-   ##
=============================================
+ Coverage      16.87%   21.01%   +4.14%     
  Complexity        10       10              
=============================================
  Files           1989     1953      -36     
  Lines          51791    41451   -10340     
  Branches        4420     3801     -619     
=============================================
- Hits            8739     8711      -28     
+ Misses         42648    32336   -10312     
  Partials         404      404              

Files	Coverage Δ
...a/broker/artemis/plugin/security/ServerPlugin.java	0.00% <ø> (ø)
...esourceLimitedServiceConfigurationManagerImpl.java	11.42% <100.00%> (ø)
...kapua/commons/event/JsonServiceEventMarshaler.java	60.00% <100.00%> (-15.00%)	:arrow_down:
.../kapua/commons/event/XmlServiceEventMarshaler.java	80.00% <100.00%> (+5.00%)	:arrow_up:
...java/org/eclipse/kapua/commons/util/ClassUtil.java	100.00% <100.00%> (ø)
.../java/org/eclipse/kapua/app/api/web/AppModule.java	87.50% <100.00%> (-2.50%)	:arrow_down:
.../kapua/service/account/internal/AccountModule.java	94.44% <ø> (ø)
...ua/service/datastore/internal/DatastoreModule.java	58.33% <ø> (ø)
.../internal/DeviceManagementConfigurationModule.java	66.66% <ø> (ø)
.../service/device/registry/DeviceRegistryModule.java	82.85% <ø> (ø)
... and 36 more

... and 46 files with indirect coverage changes

[Coduz]

Ip review filed: https://gitlab.eclipse.org/eclipsefdn/emo-team/iplab/-/issues/14226

[Coduz]

Ip review approved!

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 0.00%. Comparing base (b073aaa) to head (0db707f). Report is 9 commits behind head on develop.

:exclamation: Current head 0db707f differs from pull request most recent head e9a4b74. Consider uploading reports for the commit e9a4b74 to get more accurate results

Additional details and impacted files

@@              Coverage Diff              @@
##             develop   #4000       +/-   ##
=============================================
- Coverage      16.85%       0   -16.86%     
=============================================
  Files           1987       0     -1987     
  Lines          51803       0    -51803     
  Branches        4422       0     -4422     
=============================================
- Hits            8733       0     -8733     
+ Misses         42666       0    -42666     
+ Partials         404       0      -404     

see 1987 files with indirect coverage changes