Remove createdBy column in Device Event CSV Export

[lorthirk]

This PR removes the createdBy column in the Device Events CSV Export

Related Issue
No related issues

[codecov]

Codecov Report

Merging #2692 into develop will decrease coverage by 0.02%.
The diff coverage is n/a.

@@             Coverage Diff              @@
##             develop   #2692      +/-   ##
============================================
- Coverage      54.12%   54.1%   -0.03%     
+ Complexity      3026    3024       -2     
============================================
  Files           1045    1045              
  Lines          29474   29474              
  Branches        2373    2373              
============================================
- Hits           15954   15947       -7     
- Misses         12425   12430       +5     
- Partials        1095    1097       +2

Impacted Files	Coverage Δ	Complexity Δ
...ua/broker/core/listener/DeviceMessageListener.java	46.8% <0%> (-6.39%)	0% <0%> (ø)
...egistry/event/internal/DeviceEventServiceImpl.java	72.34% <0%> (-4.26%)	11% <0%> (-1%)
...nnection/internal/DeviceConnectionServiceImpl.java	58.44% <0%> (-2.6%)	12% <0%> (-1%)

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