Fixed CORS filtering fail causing print of stacktrace in HTTP Response

[Coduz]

This PR fixes the behaviour of the CORS request Filter to return an error with stacktraces when a CORS request is not valid.

Related Issue
This PR is complementary to PR #3278 and #3292

Description of the solution adopted
Replaced throw new ServletException with httpResponse.sendError

Screenshots
None

Any side note on the changes made
Small improvements to the code and the message logging

[codecov]

Codecov Report

Merging #3294 (825eca4) into develop (c345545) will decrease coverage by 0.31%.
The diff coverage is 0.00%.

❗ Current head 825eca4 differs from pull request most recent head 012a01f. Consider uploading reports for the commit 012a01f to get more accurate results

@@              Coverage Diff              @@
##             develop    #3294      +/-   ##
=============================================
- Coverage      54.13%   53.82%   -0.32%     
+ Complexity       787      784       -3     
=============================================
  Files           1475     1475              
  Lines          30150    30152       +2     
  Branches        2520     2521       +1     
=============================================
- Hits           16322    16229      -93     
- Misses         12909    12994      +85     
- Partials         919      929      +10     

Impacted Files	Coverage Δ	Complexity Δ
.../kapua/app/api/core/filter/CORSResponseFilter.java	0.00% <0.00%> (ø)	0.00 <0.00> (?)
...t/exception/DeviceManagementTimeoutErrorCodes.java	0.00% <0.00%> (-100.00%)	0.00% <0.00%> (ø%)
...nt/exception/DeviceManagementTimeoutException.java	0.00% <0.00%> (-75.00%)	0.00% <0.00%> (ø%)
...a/service/account/internal/AccountCreatorImpl.java	48.57% <0.00%> (-51.43%)	0.00% <0.00%> (ø%)
...pua/job/engine/exception/JobResumingException.java	0.00% <0.00%> (-25.00%)	0.00% <0.00%> (ø%)
...a/service/account/internal/AccountServiceImpl.java	60.71% <0.00%> (-24.29%)	0.00% <0.00%> (ø%)
...stractKapuaConfigurableResourceLimitedService.java	76.19% <0.00%> (-9.53%)	0.00% <0.00%> (ø%)
...kapua/job/engine/exception/JobEngineException.java	54.54% <0.00%> (-9.10%)	0.00% <0.00%> (ø%)
...apua/job/engine/jbatch/JobEngineServiceJbatch.java	43.51% <0.00%> (-8.34%)	7.00% <0.00%> (-1.00%)
...ce/management/commons/call/DeviceCallExecutor.java	58.13% <0.00%> (-4.66%)	0.00% <0.00%> (ø%)
... and 12 more