This PR prepares marvin and tests for python3. it was part of #4479, until nose2 was decided to be abandoned from that PR.
Re-PR of #4543 and #3730 to enable cooperation
Co-authored-by: Daan Hoogland <dahn@onecht.net>
Co-authored-by: Gabriel Beims Bräscher <gabriel@apache.org>
Co-authored-by: Rohit Yadav <rohit.yadav@shapeblue.com>
1. snapshot related
2. template create from volume.
3. VM create from ISO.
4. Data volume related operations on a non RBD storage.
Signed-off-by: SrikanteswaraRao Talluri <talluri@apache.org>