add model to test tesource.
use http Client() for tests from TestCase instance. self.client
add tests for core resource meta_functionality
add comments for module
add test for is_inherited method
split base resource test into application
fix tests for resource_meta check
split tests for resource relationship into different module
fix resource creation order.
make request optional for resource get/create operations
Merge branch 'feature/base_authorization' into develop
fix skipped tests