[DefaultLogger] added unit test for buildFinished

[siad007]

Related to #1161

[codecov]

Codecov Report

Merging #1164 into master will increase coverage by 0.04%.
The diff coverage is 100%.

@@             Coverage Diff              @@
##             master    #1164      +/-   ##
============================================
+ Coverage     46.01%   46.06%   +0.04%     
  Complexity     9968     9968              
============================================
  Files           505      505              
  Lines         24475    24475              
============================================
+ Hits          11262    11274      +12     
+ Misses        13213    13201      -12

Impacted Files	Coverage Δ	Complexity Δ
classes/phing/listener/DefaultLogger.php	34.61% <100%> (+12.82%)	36 <0> (ø)	⬇️
classes/phing/BuildEvent.php	90.62% <0%> (+6.25%)	12% <0%> (ø)	⬇️

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