Use Java Bean for connection details and add more tests

[artur-ciocanu]

Description

This PR adds some cleanup to existing Spring Boot infra.

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: #1316

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

[artur-ciocanu]

@cicoyle and @salaboy this is a tiny PR that should make sure that we use Java Bean spec for our connection details as well as adding proper test coverage to DaprClientAutoconfiguration.

[siri-varma]

LGTM

[mcruzdev]

Great pull request!

[cicoyle]

Appreciate the alignment with Java Bean patterns and the improved test coverage 🎉

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 77.20%. Comparing base (d759c53) to head (18bc945).
Report is 132 commits behind head on master.

Additional details and impacted files

@@             Coverage Diff              @@
##             master    #1317      +/-   ##
============================================
+ Coverage     76.91%   77.20%   +0.29%     
- Complexity     1592     1728     +136     
============================================
  Files           145      200      +55     
  Lines          4843     5283     +440     
  Branches        562      576      +14     
============================================
+ Hits           3725     4079     +354     
- Misses          821      894      +73     
- Partials        297      310      +13     

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