Log4j update for sample controller

[kowalczyka]

Changes in this Pull Request:

• update of log4j lib to version 2 for sample controller
• closes #76

Mandatory checks:

• [x] latest changes were fetched from the upstream branch before creating this PR (branch is up to date)
• [x] changes were tested manually
• [ ] unit tests were properly implemented
• [ ] communication about interdependent changes has been sent to the team (if applicable)
• [x] respective Jenkins jobs were referenced in additional context section of this PR

OSCM Build References:

• OSCM Build And Push job - #598

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This change is 

[codecov[bot]]

Codecov Report

Merging #77 into master will increase coverage by 0.11%. The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master      #77      +/-   ##
==========================================
+ Coverage   36.16%   36.28%   +0.11%     
==========================================
  Files         254      253       -1     
  Lines       16369    16337      -32     
  Branches     2162     2161       -1     
==========================================
+ Hits         5920     5928       +8     
+ Misses      10134    10094      -40     
  Partials      315      315              

Impacted Files	Coverage Δ
.../app/sample/controller/SampleControllerAccess.java	88.88% <100.00%> (+88.88%)	:arrow_up: