Make sure that the configuration file suffix is propagated to subdirs

This prevents alternate configuration files that aren't in the top-level
directory from being ignored.
Update CI build names to point at the latest Bio-Formats jobs
Merge pull request #864 from melissalinkert/config-fix

Make sure that the configuration file suffix is propagated to subdirs
Merge pull request #869 from sbesson/ci_latest_jobs

Update CI build names to point at the latest Bio-Formats jobs