ciao-image: Ignore image removal when it does not exist.
ciao-image: Ignore image removal when it does not exist.

When deleting an image, it will ignore when the error is that
image file does not exist. We may have images with no file, just
metadata. It will return any error different than "Not Exist" in case
of failure.

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

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