revert "Monitor: Only sleep non-success, nonfirst loop iterations"

This reverts commit 91288fd28d7ea22bfad1bdf4f4bb4ced7e4447aa.

Change-Id: Ia0302426d67945991f50eaab9803dbc64a0c8dd0
Reviewed-on: http://review.couchbase.org/40174
Tested-by: buildbot <build@couchbase.com>
Reviewed-by: Pavel Paulau <pavel.paulau@gmail.com>