Merged: https://review.opendev.org/#/c/702300/ Introduces 62 new unit tests to cover sysinv network api In Review: https://review.opendev.org/#/c/702975/ Introduces 20 new unit tests to cover sysinv oam network api https://review.opendev.org/#/c/703212/ Introduces 14 new unit tests to cover sysinv address api Issues uncovered: https://bugs.launchpad.net/starlingx/+bug/1859855 https://bugs.launchpad.net/starlingx/+bug/1860176 https://bugs.launchpad.net/starlingx/+bug/1860186