Fix Travis-CI's Repo Slug
Fix Travis-CI's Repo Slug

This patch corrects issue #636 where the repo slug in `.travis.yml`
pointed to `emccode/rexray` instead of `codedellemc/rexray`.

akutz/rexray,thecodeteam/rexray,oppodeldoc/rexray,cduchesne/rexray,codedellemc/rexray,akutz/rexray,emccode/rexray,oppodeldoc/rexray,emccode/rexray,cduchesne/rexray,codedellemc/rexray,oppodeldoc/rexray,emccode/rexray,akutz/rexray,codedellemc/rexray,thecodeteam/rexray,cduchesne/rexray,akutz/rexray,oppodeldoc/rexray,thecodeteam/rexray,thecodeteam/rexray,cduchesne/rexray,thecodeteam/rexray,akutz/rexray,codedellemc/rexray,oppodeldoc/rexray,thecodeteam/rexray,codedellemc/rexray,akutz/rexray,cduchesne/rexray,emccode/rexray,codedellemc/rexray,oppodeldoc/rexray,cduchesne/rexray