fix a bug where urls might not be loaded if the module existed but not the class
fix a bug where urls might not be loaded if the module existed but not the class

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