Default the retryable sleep to use exponential backoff
Fix typo in error message
Health monitor should use SSL when director is using SSL.

[closes #42401181 & #42401209]
Revert "Health monitor should use SSL when director is using SSL."

If you do not set 'director.encryption' then the director does not try
and use SSL but some things are hard-coded to use SSL now. This is
breaking things. Reverting until we can fix.

This reverts commit 5788c9175bced1b5b1e3264233d14741be040664.
Make health monitor use SSL to director all the time.

[fixes #42401181 #42401209]
NAT box uses 10.10.0.10 so we should not try and use it