[Starts #80559928] Fixed issues with DB being closed, removed close() method on DataAccessManager: it was close to useless, but was causing trouble
Merge branch 'develop' into 80559928_Resources-API
Added scoverage to sentinel_core and tried to exclude the Reverse.* classes from coverage; thus far unsuccessfully
Merge branch 'develop' into 80559928_Resources-API
Added minimum test coverage failure
Merge branch '80559928_Resources-API' into develop

A number of fixes have been introduced, which are worth
bringing into `develop` even before the actual story is
complete (or even started, for that matter).