Added backend watchdog wrapper.
Added backend watchdog wrapper.

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