Blocking changesets when upgrading to 1.10 should direct to better explanations

There are a several liquibase changesets that serve to block the upgrade to 1.10 if you don't have your DB in a known-upgradable configuration. These need to give better explanations of what is happening.

At a minimum, we should:

• Break the changeset introduced in TRUNK-4283 into separate changesets so you are warned of the precise error, not "error 1, 2, or 3".
• Any changeset that blocks the upgrade needs to its failure message point to an OpenMRS permaurl, to a wiki page that describes all manual things you might need to do while upgrading.

See https://groups.google.com/a/openmrs.org/d/msg/dev/f6RlsNx3M4w/Wljwb7qOqZgJ