Added unit test for Issues.
Added unit test for Issues.

(cherry picked from commit fc187a0)

jenkinsci/analysis-model,whaph/analysis-model,jenkinsci/analysis-model,jenkinsci/analysis-model,jenkinsci/analysis-model,mschmidae/analysis-model,mschmidae/analysis-model,isigoing/analysis-model,mschmidae/analysis-model