Don't checkBuildFailureThreshold if we are creating the baseline

[BraisGabin]

I'm not sure why create the baseline using java -jar ... works but if you do it using the gradle plugin fails. It should fail in both cases, I'm missing something nearly from sure. But at least this quick fix fixes #2033

[codecov-io]

Codecov Report

❗ No coverage uploaded for pull request base (master@4790a9b). Click here to learn what that means.
The diff coverage is 100%.

@@            Coverage Diff            @@
##             master    #2034   +/-   ##
=========================================
  Coverage          ?   80.44%           
  Complexity        ?     1996           
=========================================
  Files             ?      329           
  Lines             ?     5610           
  Branches          ?     1026           
=========================================
  Hits              ?     4513           
  Misses            ?      552           
  Partials          ?      545

Impacted Files	Coverage Δ	Complexity Δ
.../io/gitlab/arturbosch/detekt/cli/runners/Runner.kt	89.28% <100%> (ø)	6 <0> (?)

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