Add an /info endpoint for getting basic application details

[RadovanTomik]

Negotiator pull request:

Description:

Adds an /info endpoint for getting basic application details. To test it, spin up the application and go to http://localhost:8081/api/actuator/info.

Checklist:

Make sure you tick all the boxes bellow if they are true or do not apply:

• I have performed a self review of my code
• My code follows Google Java Code style
• I have made my code as simple as possible
• I have added unit tests and the code coverage has not decreased
• I have updated the documentation in all relevant places

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 75.88%. Comparing base (1ab113d) to head (6e5abbe).

Additional details and impacted files

@@            Coverage Diff            @@
##             master     #243   +/-   ##
=========================================
  Coverage     75.88%   75.88%           
  Complexity      908      908           
=========================================
  Files           125      125           
  Lines          2700     2700           
  Branches        155      155           
=========================================
  Hits           2049     2049           
  Misses          541      541           
  Partials        110      110           

Flag	Coverage Δ
unit	75.88% <ø> (ø)

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