storage_stats: Bump the timeout & max connection count

Odd that it managed to pass multiple runs of CI but is now suddenly timing out, but it appears to still be working just fine based on the log output, so just try to make it a tad faster & make sure it can take longer.

https://phabricator.apertis.org/T8197

Signed-off-by: Ryan Gonzalez ryan.gonzalez@collabora.com