This PR fixes two issues:
When HOST_DATA_ROOT_PATH is not set it resulted in volume names with a leading None (e.g. Nonemy-project-pylab-p-my-project-s-test-vol).
The validation of the HOST_DATA_ROOT_PATH parameter (must end with slash) was not actually performed as it was not put into a validator method.
This PR fixes two issues: When HOST_DATA_ROOT_PATH is not set it resulted in volume names with a leading
None(e.g.Nonemy-project-pylab-p-my-project-s-test-vol).The validation of the HOST_DATA_ROOT_PATH parameter (must end with slash) was not actually performed as it was not put into a validator method.