Revert "disable sleep"

This reverts commit 99b8f266.
1 job for master in 3 minutes and 47 seconds (queued for 1 second)
Status Job ID Name Coverage
  Test
failed #3227
vc
vm

00:03:47

 
Name Stage Failure
failed
vm Test
ERROR! Your Ansible version (2.10.2) is too recent. The most recent version
supported by Mitogen for Ansible is (2, 9).x. Please check the Mitogen
release notes to see if a new version is available, otherwise
subscribe to the corresponding GitHub issue to be notified when
support becomes available.

https://mitogen.rtfd.io/en/latest/changelog.html
https://github.com/dw/mitogen/issues/
ERROR: Job failed: exit status 1