This change adds support for 'web-download' import method
to 'image-import' and 'create-image-via-import' call.
To use this 'web-download' import method, user needs to pass
--uri option 'a valid uri to external image to import in glance'
to 'image-import' and 'create-image-via-imaport' calls.
Co-authored-by: Pranali Deore <pdeore@redhat.com>
Co-authored-by: Erno Kuvaja <jokke@usr.fi>
Change-Id: I0e1d18844f64723608288de473e97710798eb602
aedabec9e4