Add assert error message
Add assert error message

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