fixed tests + removed slots field
better error message when env is now owned by service
added select_related
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.
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
Add invoice_date and invoice_no to Asset relaitons report
Fix and refactor TestExportRelations info factory-boy
Merge pull request #477 from quamilek/columns-in-assets-report-csv

Add invoice_date and invoice_no to Asset relaitons report
Merge pull request #466 from ar4s/improvments/reduce-sql-queries

Reduce SQL queries
Fix column order in csv report
Merge pull request #482 from quamilek/report-column-order

Fix column order in csv report
added test_save_without_changes tests to licence & support
fixed tests: update_support_by_form, update_licence_by_form
added new field segment