Ensure that the CA cert for the deployment is passed to
requests when retrieving stream data from swift.
Refresh the product catalog entry on each attempt to retrieve
stream data as the URL will update once data was been written
to the swift endpoint in the deployment.
Retry on KeyError and drop number of retry attempts
Add a log message to detail URL being used for product-stream data
Log return data from streams endpoint
Fixup endpoint resolution
Use action to complete initial image sync for the gss charm.
This avoids races where the images end up in the wrong locations
and allows the tests to actually know when images should be
discoverable.
Update tests to wait for at least four images (20.04 is synced
by default).