Fix return in case of error
Fix return in case of error

1) In case of error, exit with status 1
2) In case of error, print stuff to stderr, else print stuff to stdout

jvinod/ost,kunalkushwaha/openstorage,pault84/openstorage,ModelRocket/openstorage,libopenstorage/openstorage,ModelRocket/openstorage,libopenstorage/openstorage,libopenstorage/openstorage,phoenix-io/openstorage,pault84/openstorage,pault84/openstorage