AllConfigFlags: do not delete flag creation function
For unit testing, it is often useful to be able to re-create the
ConfigFlags
from scratch to be able to test with different settings
(e.g. different input files). This can now be done via:
from AthenaConfiguration.AllConfigFlags import _createCfgFlags
ConfigFlags = _createCfgFlags()
cc @wlampl @tbold: I am open for better suggestions, i.e. if we should drop the _
. But maybe this way it's clear this should only be used by experts.