Fix NPE in ServiceConfigurations resource by handling missing Account

[MDeLuise]

Description

This pull request addresses a potential NullPointerException (NPE) in the ServiceConfigurations resource of the Kapua REST API. The issue arises when the scopeId provided does not match any existing account.

Details

Currently, the ServiceConfigurations resource performs the following operation:

Account account = accountService.find(scopeId);
configurableService.setConfigValues(scopeId, account.getScopeId(), serviceComponentConfiguration.getProperties());

If the accountService.find(scopeId) method returns null, attempting to call account.getScopeId() will result in a NullPointerException.

The problem occurs specifically with the following calls:

• PUT v1/{non-existing-scope-id}/serviceConfigurations
• PUT v1/{non-existing-scope-id}/serviceConfigurations/{dummy-component-id}

Changes

• Added a check to see if accountService.find(scopeId) returns null.
• Throw KapuaEntityNotFoundException if the account is not found for the given scopeId.

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 6 lines in your changes missing coverage. Please review.

Project coverage is 16.81%. Comparing base (c2f4542) to head (09ac94c).
Report is 3 commits behind head on develop.

Additional details and impacted files

@@              Coverage Diff              @@
##             develop    #4062      +/-   ##
=============================================
- Coverage      16.81%   16.81%   -0.01%     
  Complexity        22       22              
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  Files           2008     2008              
  Lines          52158    52162       +4     
  Branches        4395     4398       +3     
=============================================
  Hits            8770     8770              
- Misses         42992    42996       +4     
  Partials         396      396              

Files	Coverage Δ
.../resources/v1/resources/ServiceConfigurations.java	0.00% <0.00%> (ø)