EmptyBuildResultsとEmptyTestResultsのシングルトンを止めた

[YoshikiHigo]

resolve #284

やったこと．

• EmptyBuildResultsはビルドがこけた情報を保持するために，diagnosticsとbuildProgressTextに情報を格納するようにした．
• EmptyTestResultsはreasonというフィールドを作り，テスト結果が得られなかった理由をそこに格納するようにした．

[codecov-io]

Codecov Report

Merging #686 into master will decrease coverage by 0.02%. The diff coverage is 64.28%.

@@             Coverage Diff              @@
##             master     #686      +/-   ##
============================================
- Coverage     78.83%   78.81%   -0.03%     
+ Complexity      880      876       -4     
============================================
  Files           143      143              
  Lines          3360     3422      +62     
  Branches        247      251       +4     
============================================
+ Hits           2649     2697      +48     
- Misses          611      623      +12     
- Partials        100      102       +2

Impacted Files	Coverage Δ	Complexity Δ
...tolab/kgenprog/project/test/LocalTestExecutor.java	76.92% <0%> (-6.42%)	2 <0> (ø)
...olab/kgenprog/project/build/EmptyBuildResults.java	50% <100%> (-50%)	1 <1> (-1)
.../kusumotolab/kgenprog/project/test/TestThread.java	93.75% <100%> (ø)	23 <0> (ø)	:arrow_down:
.../kusumotolab/kgenprog/ga/variant/VariantStore.java	100% <100%> (ø)	24 <0> (ø)	:arrow_down:
...motolab/kgenprog/project/build/ProjectBuilder.java	100% <100%> (ø)	12 <0> (ø)	:arrow_down:
...otolab/kgenprog/project/test/EmptyTestResults.java	72.72% <50%> (-27.28%)	6 <1> (ø)
...otolab/kgenprog/project/factory/TargetProject.java	50% <0%> (-4.55%)	6% <0%> (-1%)
...in/java/jp/kusumotolab/kgenprog/Configuration.java	85.25% <0%> (+0.32%)	25% <0%> (-2%)	:arrow_down:

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[shinsuke-mat]

お疲れさんです