library/roles/smartgears/smartgears: Fix the new token management.
d4science-ghn-cluster/group_vars/smart_genericworker_dev_devnext: The new token management needs a different scopes handling. And a new variable: smartgears_scopes.
library/roles/smartgears/smart_executor/tasks/main.yml: Change the conditionals so we can let the role remove the application when smart_executor_install is set to 'False'.