[1139735] More i-test fallout, oracle only
Unlike Postgres, where DDL changes can be transactional, Oracle executes
DDL (like adding a column) like autocommit=true.  As such, it can't happen
within an existing Tx, which is what we have by default in out itest
setup beans (@PostConstruct).  Change things to execute the DDL outside
of an existing Tx.

(cherry picked from commit ae3d37af4896bea2af151e82d24a43147643b46a)
Signed-off-by: Jay Shaughnessy <jshaughn@redhat.com>