Add text to show expected and got value in alert tests
Add text to show expected and got value in alert tests

jeffbryner/MozDef,gdestuynder/MozDef,gdestuynder/MozDef,mozilla/MozDef,mozilla/MozDef,Phrozyn/MozDef,mpurzynski/MozDef,gdestuynder/MozDef,Phrozyn/MozDef,mozilla/MozDef,gdestuynder/MozDef,mpurzynski/MozDef,Phrozyn/MozDef,mpurzynski/MozDef,mozilla/MozDef,jeffbryner/MozDef,Phrozyn/MozDef,jeffbryner/MozDef,jeffbryner/MozDef,mpurzynski/MozDef