Merge pull request #2006 from fdlk/feature/meta

RepositoryCreator -> ManageableCrudRepositoryCollection
refactor ScriptRunnerFactory to work with
ManageableCrudRepositoryCollection
Merge pull request #2008 from jjettenn/feature/meta

refactor ScriptRunnerFactory to work with ManageableCrudRepositoryCollection
use entityMetaData instead of entity name
add entities and no strings.
set the entity of the entityMetaData in de attributeMetaData map entity
set the entity of the package in de entityMetaData map entity
Merge pull request #2009 from jjettenn/feature/meta

add entities and no strings.
W.I.P trying to fix EmxImportServiceTest
Don't need to explicitly clean up, refreshRepositories already does that.
Fix NullPointerException for attributes that don't have a refEntity.
Fix NPE when deleting non-existent entity.
Put package-less entities into the default package.
Small changes.
Add default package only once.
Merge pull request #2010 from jjettenn/feature/meta

W.I.P trying to fix EmxImportServiceTest
Revert "W.I.P trying to fix EmxImportServiceTest"
Merge pull request #2011 from molgenis/revert-2010-feature/meta

Revert "W.I.P trying to fix EmxImportServiceTest"
Merge branch 'feature/meta' of https://github.com/jjettenn/molgenis into feature/meta

Conflicts:
	molgenis-data-mysql/src/test/java/org/molgenis/data/importer/EmxImportServiceTest.java
Merge branch 'feature/meta' of https://github.com/molgenis/molgenis into feature/meta

Conflicts:
	molgenis-data-mysql/src/test/java/org/molgenis/data/importer/EmxImportServiceTest.java