clusterctl discover command should not be a blocking call.

[vvb]

When clusterctl discover <ip> is executed, the shell prompt does not return until the underlying ansible run has completed.

EDIT:
Noticed it once. The next run did not block. As per @mapuri the command blocks when there are ansible-runs queued. When I noticed it earlier, it was during a good run after a scenario which had resulted in ansible error earlier. Need to re-check

[vvb]

have run multiple iterations and haven't noticed this. I am starting to believe that there must have been a pending ansible run that must have caused this. closing this, until I notice it again.