Iterate analysis over all available tags for a given image digest
Iterate analysis over all available tags for a given image digest

Fixes #1139

Signed-off-by: Swathi Gangisetty <091c938bd5ea586b41042e211e6bb317f21a220e@anchore.com>

anchore/anchore-engine,anchore/anchore-engine,anchore/anchore-engine