started on importer to be able to read package sheet
Fully qualified EntityMetaData name.

molgenis.data.EntityMetaData bean has one fullyQualifiedName field which gets interpreted as [packageName.]Name.
The EntityMetaDataRepository stores all three attributes: fullName(unique id), package and name. 
Use name "default" for default package.
Add PackageRepository
Use packageRepository.
Fix some inter-test dependencies caused by the shared in-memory database.