[#2083] package_create: make sure datasets have a valid type
[#2083] package_create: fix variable name
[#2083] package_create: tolerate fallback plugins with empty package_type lists
[#2083] typo
Merge branch '2083-force-dataset-type' of https://github.com/wardi/ckan into wardi-2083-force-dataset-type
Merge branch 'wardi-2083-force-dataset-type'