Release candidate 3.21.0rc1 Testing

[sotorrio1]

I ran through the testing in here: https://github.com/CCSI-Toolset/devops/blob/main/release_candidate_testing.md

Everything works but there are a couple of items to discuss:

• When I run any type of regular SDoE (without the Dask flag) I can see the following ERROR in the console
  

• There are a few places in the code for UQ, SDoE and ODoE that use the file foqus_lib/framework/sampleResults/results.py and during all these tutorials I got some FutureWarning messages about an upcoming deprecation within pandas. I've opened issue Upcoming pandas deprecation #1212 to take care of this after the release.

[sotorrio1]

Issue #1212 should be fixed with PR #1214

[lbianchi-lbl]

I think the Dask error being shown could be fixed by using logging.info() instead of .exception() here:

FOQUS/foqus_lib/framework/sdoe/sdoe.py

Lines 96 to 104 in 47053af

	use_dask = False
	try:
	get_client()
	use_dask = True
	except ValueError:
	logging.getLogger("foqus." + __name__).exception(
	"Unable to load Dask client, continuing without it using original algorithms"
	)
	pass

I think this would be more in line with the semantics of the check (the user should be notified, but nothing would stop working per se) without having to make changes to the code. I'll open a PR with this change (#1215).