Bug louvain reverted fix

[ChuckHastings]

One of the recent PRs to migrate things from the experimental namespace into the cugraph namespace accidentally overwrote this bug fix. Reapplying it.

[codecov-commenter]

Codecov Report

❗ No coverage uploaded for pull request base (branch-21.10@70b4ad3). Click here to learn what that means.
The diff coverage is n/a.

❗ Current head bd7f683 differs from pull request most recent head a967638. Consider uploading reports for the commit a967638 to get more accurate results

@@               Coverage Diff               @@
##             branch-21.10    #1766   +/-   ##
===============================================
  Coverage                ?   59.75%           
===============================================
  Files                   ?       77           
  Lines                   ?     3523           
  Branches                ?        0           
===============================================
  Hits                    ?     2105           
  Misses                  ?     1418           
  Partials                ?        0           

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 70b4ad3...a967638. Read the comment docs.

[BradReesWork]

@gpucibot merge