Add newly created PackageImpl to parent's subpackages.
... only if the parent is not null.
Fix import
Merge pull request #2019 from fdlk/master

Add newly created PackageImpl to parent's subpackages.
Merge branch 'master' of https://github.com/molgenis/molgenis
full_name
Fix rollback
Merge pull request #2021 from erwinwinder/master

Fix import
Merge branch 'master' of https://github.com/molgenis/molgenis
Prototype BMB standards registry