Add tests to ensure DataPackage uses base schema by default
Add tests to ensure DataPackage uses base schema by default

okfn/datapackage-py,okfn/datapackage-model-py,sirex/datapackage-py,okfn/datapackage-py,datapackages/datapackage-py,okfn/datapackage-model-py,sirex/datapackage-py,datapackages/datapackage-py