Experiments without ensembles are not persisted about ert

[olvemaudal]

Just since I spent at least 42 seconds looking into this issue... my guess is that this is caused by line 166 in local_experiment.py

My 2 cents

[eivindjahren]

This issue is was not resolved by #7129 . The test case in the original bug report still fails.

[eivindjahren]

Please delete the following workaround in the tests when closing this issue:

ert/tests/unit_tests/storage/test_local_storage.py

Lines 322 to 325 in 55a5e12

	# Ensure that there is at least one ensemble in the experiment
	# to avoid https://github.com/equinor/ert/issues/7040
	ensemble = self.storage.create_ensemble(experiment_id, ensemble_size=1)
	self.experiments[experiment_id].ensembles[ensemble.id] = {}

[oyvindeide]

Removed the bug label as this is arguably expected behavior, as all experiments should have an ensemble. Is it possible to reproduce this though the gui for example?

[eivindjahren]

I guess this will become possible through the Gui with the new "experiment manager"?