Changes from original tests:
- Methods and variables set according to OSP deployer tool in base class.
- Adjust migrated imports and configuration.
- Added OVN backend check instead of configuration check.
- Replaced test UUIDs with unique ones.
- Fixed typos throughout file.
Change-Id: I8656d56d579b73dd39c3bd37c46516ada5f78a6c
e33d47c604