DM-33946: Add a namespace to the test universe configuration

[timj]

"1" is a valid upstream dimension version so the
namespace is needed to disambiguate.

Requires lsst/daf_butler#683

Checklist

• ran Jenkins
• added a release note for user-visible changes to doc/changes

[codecov]

Codecov Report

Merging #183 (fe89105) into main (b02ad94) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             main     #183   +/-   ##
=======================================
  Coverage   82.65%   82.65%           
=======================================
  Files          47       47           
  Lines        3649     3649           
  Branches      591      591           
=======================================
  Hits         3016     3016           
  Misses        465      465           
  Partials      168      168           

Impacted Files	Coverage Δ
tests/test_cmdLineFwk.py	97.71% <ø> (ø)

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