Exclude 'examples' modules from spotbugs analysis

[ejba]

Description

Fixes #906

Issue reference

We strive to have all PR being opened based on an issue, where the problem or feature have been discussed prior to implementation.

Please reference the issue this PR will close: #[issue number]

Checklist

Please make sure you've completed the relevant tasks for this PR, out of the following list:

• Code compiles correctly
• Created/updated tests
• Extended the documentation

[codecov]

Codecov Report

Patch and project coverage have no change.

Comparison is base (64423bd) 76.47% compared to head (423601a) 76.47%.

Additional details and impacted files

@@            Coverage Diff            @@
##             master     #907   +/-   ##
=========================================
  Coverage     76.47%   76.47%           
  Complexity     1398     1398           
=========================================
  Files           132      132           
  Lines          4264     4264           
  Branches        497      497           
=========================================
  Hits           3261     3261           
  Misses          743      743           
  Partials        260      260           

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