workaround database_connection_failed_fires failure. it seems the test is not running the hook because it doesn't enter the _get_connection function from Dancer::Plugin::Database::Core in the first place. A few well placed prints shown that sometimes a non-expired handle is obtained from the previous connection, making the function return early without attempting to get a new one, thus having no chance to branch to the hook. . If I force disconnect the existing handle and wait for expiration, then the test is reliably passing on my end; I'm not entirely certain of the relevance of the resulting test though. . This workaround is applied for the Debian package in order to stabilize autopkgtest per Paul Gevers' remark in #923824.
