ciao-image: Fix raw datastore error handling on ciao-image service
ciao-image: Fix raw datastore error handling on ciao-image service

This commit fixes the loss of ceph error when an image upload operation
is performed. Now, Ceph errors are properly returned and Metadata errors
are separately handled.

Fixes #905

Signed-off-by: Obed N Munoz <6e5b23a9efbce03e6440ea9b699a6874389894d3@intel.com>

wcwxyz/ciao,matthewrsj/ciao,mcastelino/ciao,kaccardi/ciao,markdryan/ciao,rbradford/ciao,mrkz/ciao,wcwxyz/ciao,01org/ciao,tpepper/ciao,mcastelino/ciao,kaccardi/ciao,ciao-project/ciao,rbradford/ciao,obedmr/ciao,ciao-project/ciao,tpepper/ciao,obedmr/ciao,obedmr/ciao,erick0z/ciao,mcastelino/ciao,01org/ciao,erick0z/ciao,tpepper/ciao,markdryan/ciao,mrkz/ciao,matthewrsj/ciao,wcwxyz/ciao,mrkz/ciao,matthewrsj/ciao,erick0z/ciao