This change blocks most handlers from running during the assess-status
hook. It may help to alievate issues around the charm trying to do
things with other services (e.g. mysql) during an assess-status hook
when it, strictly speaking, should only be assessing its internal status
and reporting on that.
Change-Id: I5ab1eadbe7e3131526221b06454725293061ba97
Related-Bug: #1883263