XNAT-2610: Enhanced ability to handle anonymization scripts. Added check for disabled site-wide anon script, now pulls whole config instead of just contents. Merged with the series import filter JSON handling.

Built jars correspond to changeset https://bitbucket.org/nrg/uploadassistant/commits/295c98f44b57b31aa921ea28b26ce2405ee41c00.
XNAT-2610 Added functionality to gray out sitewide anon script when it is disabled.