fix kannel backend module path
fix kannel backend module path

lsgunth/rapidsms,peterayeni/rapidsms,catalpainternational/rapidsms,peterayeni/rapidsms,ehealthafrica-ci/rapidsms,lsgunth/rapidsms,caktus/rapidsms,peterayeni/rapidsms,caktus/rapidsms,catalpainternational/rapidsms,peterayeni/rapidsms,lsgunth/rapidsms,eHealthAfrica/rapidsms,ehealthafrica-ci/rapidsms,catalpainternational/rapidsms,eHealthAfrica/rapidsms,eHealthAfrica/rapidsms,lsgunth/rapidsms,catalpainternational/rapidsms,ehealthafrica-ci/rapidsms,caktus/rapidsms