fixing an issue in test_router that seemed to be breaking (at least on windows). (cherry picked from commit b668e722795215ff43aa773d2074493092243b05)
fixing an issue in test_router that seemed to be breaking (at least
on windows).
(cherry picked from commit b668e722795215ff43aa773d2074493092243b05)

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