populate msg.reporter (etc) attrs with None
populate msg.reporter (etc) attrs with None

(when no reporter is recognized, so we don't have to check for the
existance of the attribute each time)

lsgunth/rapidsms,catalpainternational/rapidsms,eHealthAfrica/rapidsms,ken-muturi/rapidsms,catalpainternational/rapidsms,peterayeni/rapidsms,eHealthAfrica/rapidsms,ehealthafrica-ci/rapidsms,dimagi/rapidsms,lsgunth/rapidsms,caktus/rapidsms,caktus/rapidsms,ehealthafrica-ci/rapidsms,catalpainternational/rapidsms,ken-muturi/rapidsms,unicefuganda/edtrac,catalpainternational/rapidsms,dimagi/rapidsms,lsgunth/rapidsms,eHealthAfrica/rapidsms,caktus/rapidsms,lsgunth/rapidsms,peterayeni/rapidsms,unicefuganda/edtrac,ken-muturi/rapidsms,ehealthafrica-ci/rapidsms,peterayeni/rapidsms,peterayeni/rapidsms,unicefuganda/edtrac