Use default failureThreshold value

[jarifibrahim]

The fabric8-wit deployment to prod-preview was successful with #2327. We don't need failureThreshold:120 which is

Minimum consecutive failures for the probe to be considered failed after having succeeded

from https://docs.openshift.com/container-platform/3.5/rest_api/openshift_v1.html#v1-probe

This PR changes the failureThreshold value back to its default value which was changed in #2298 and #2295

Also see #2291

[alien-ike]

Ike Plugins (test-keeper)

Thank you @jarifibrahim for this contribution!

It appears that no tests have been added or updated in this PR.

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[codecov]

Codecov Report

Merging #2328 into master will decrease coverage by 0.01%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #2328      +/-   ##
==========================================
- Coverage   70.17%   70.15%   -0.02%     
==========================================
  Files         171      171              
  Lines       16625    16625              
==========================================
- Hits        11666    11664       -2     
- Misses       3829     3830       +1     
- Partials     1130     1131       +1

Impacted Files	Coverage Δ
workitem/workitem_repository.go	67.79% <0%> (-0.23%)	⬇️

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