removed some aliases from utils.
removed some aliases from utils.

they were causing the django orm to be started up whenever utils was
imported, which was preventing the rapidsms utils from being used
outside of the typical runserver/router context.

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