fixed tests + removed slots field
better error message when env is now owned by service
added quantity to licences
updated changelog
Merge pull request #465 from ar4s/multi-item-licence

Added quantity to licences
licences instead of licence_set
Merge pull request #467 from ar4s/hotfix/related-name-asset-licences

Licences instead of licence_set
Add Service and Device Environment to REST API
Change resources link
Merge pull request #470 from quamilek/hotfix/api-environment-service

Add Service and Device Environment to REST API
Merge pull request #471 from xliiv/valid-env-field

Check if environment belongs to related.
changed asset factories to include default region
Merge branch 'develop' into release/2.3.0

Conflicts:
	src/ralph_assets/tests/functional/tests_view.py
Merge branch 'release/2.3.0' into develop
Merge branch 'feature/regions' into regionalized-license

Conflicts:
	CHANGES.rst
	src/ralph_assets/forms.py
	src/ralph_assets/models_assets.py
	src/ralph_assets/tests/functional/tests_dependency.py
	src/ralph_assets/tests/functional/tests_multivalue_fields.py
regionalized licenses with broken tests
added regions feature to licences + small fixes
moved middleware to ralph-core
Merge pull request #478 from xliiv/regionalized-license

Regionalized license