(PDB-769) Deprecate PostgreSQL 9.2 and older

This patch deprecates PostgreSQL 9.2 and older.

Signed-off-by: Ken Barber <ken@bob.sh>
Merge pull request #1056 from kbarber/ticket/master/pdb-769-deprecate-postgresql-93

(PDB-769) Deprecate PostgreSQL 9.2 and older