Merge branch 'py3-ch-datasourcecache' into 'master'

Fix DatasourceCache compress encoding.

See merge request !3426

(cherry picked from commit 43ba399e)

8f592f93 Fix DatasourceCache compress encoding.
9 jobs for !3427 with cherry-pick-43ba399e in 16 minutes and 47 seconds (queued for 2 seconds)
merge request