restapi: Fix broken path to the image under glance storage domain

Changes broken link to the glance image from /api/images/${imageId}
to /api/storagedomains/${storageDomainId}/images/${imageId}

Change-Id: I480e798e3c74af8357d48a1fd93a4ce4ae608383
Bug-Url: https://bugzilla.redhat.com/1035997
Signed-off-by: Sergey Gotliv <sgotliv@redhat.com>