Docker Build Output Info
Docker Build Output Info

This patch updates the docker build to indicate when an image is being
pulled as well as redirects STDERR for the "which go" command to
/dev/null for Linux distros that emit an error when the command is not
present.

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