Add option to suppress log in job summary

[mrginglymus]

Fixes #92

I ummed and ahhed a bit over whether to have suppressLogs vs includeLogs but I went with true == override default behaviour (with the assumption that most people do want logs).

[timja]

looks right

[mrginglymus]

There's a leak in our ChecksProperties test extension.

[XiongKezhi]

LGTM except for the test failures and pmd warnings.

[mrginglymus]

Not sure on those test failures given it works on my machine and Jenkins test infra; I think GitHub got confused by the ninja force push.

[codecov]

Codecov Report

Merging #93 (dfdd569) into master (bf2e07e) will increase coverage by 0.03%.
The diff coverage is 77.77%.

@@             Coverage Diff              @@
##             master      #93      +/-   ##
============================================
+ Coverage     85.90%   85.94%   +0.03%     
- Complexity      150      151       +1     
============================================
  Files            17       17              
  Lines           731      733       +2     
  Branches         54       55       +1     
============================================
+ Hits            628      630       +2     
  Misses           85       85              
  Partials         18       18              

Impacted Files	Coverage Δ	Complexity Δ
.../checks/status/AbstractStatusChecksProperties.java	42.85% <0.00%> (-7.15%)	1.00 <0.00> (ø)
...s/plugins/checks/status/FlowExecutionAnalyzer.java	81.25% <85.71%> (+0.83%)	45.00 <0.00> (+1.00)
...gins/checks/status/BuildStatusChecksPublisher.java	80.26% <100.00%> (ø)	14.00 <1.00> (ø)

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[XiongKezhi]

Not sure on those test failures given it works on my machine and Jenkins test infra; I think GitHub got confused by the ninja force push.

Passed on my local machine, but still failed in java 11 build after merging this. Maybe it's a java 11 build problem, I'll test it out.