refactored tests
last hostname stored in another model
last hostname stored in another model
refactored tests
after review
added migration
removed old migration
Merge branch 'develop' into 330-last-hostname-in-apart-table-2

Conflicts:
	src/ralph_assets/tests/functional/tests_view.py
Merge branch 'develop' into 330-last-hostname-in-apart-table-2
Merge pull request #349 from ar4s/330-last-hostname-in-apart-table-2

Last hostname in apart table