Log4j update

[kowalczyka]

Changes in this Pull Request:

• log4j upgrade related changes

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 - #601

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This change is 

[codecov[bot]]

Codecov Report

Merging #79 into master will increase coverage by 0.15%. The diff coverage is 66.66%.

@@            Coverage Diff             @@
##           master      #79      +/-   ##
==========================================
+ Coverage    61.2%   61.36%   +0.15%     
==========================================
  Files          26       26              
  Lines        1026     1025       -1     
  Branches      114      114              
==========================================
+ Hits          628      629       +1     
+ Misses        371      369       -2     
  Partials       27       27

Impacted Files	Coverage Δ
src/main/java/org/oscm/app/shell/Initializer.java	39.68% <66.66%> (+2.18%)	:arrow_up: