CORE-6040 updated donkey's usage of data-info cart

donkey now handles response codes correctly from data-info's cart endpoint.
CORE-6040 Converted exits-by-id endpoint to liberator
CORE-6040 compacted cart logic
CORE-6040 converted entry to liberator
CORE-6040 converted donkey to using entry endpoint

/secured/filesystem/display-download calls /entries/path/:zone/* endpoint in data-info service
Merge branch 'wrap-irods' of https://github.com/iPlantCollaborativeOpenSource/DiscoveryEnvironmentBackend into wrap-irods
CORE-6040 added data-info to project-defs
added build artifacts to .gitignore