Until now, to access the configuration of a scenario, the full path in
test_env had to be specified.
This might be cumbersome and error prone.
Create a scenario fixture, to make it easier to access the same
configuration.
Instead of
test_env["testdata"]["my_scenario"]["my_config"]
one can use the following:
scenario["my_config"]
Signed-off-by: Hunor Csomortáni <csomh@redhat.com>