Applying smoyer64's PostgreSQL driver fix to the WildFly 9 branch:

Deleted the PostgreSQL JDBC driver 8.4 (labelled postgresql-jdbc3.jar
but really postgresql-8.4-701-jdbc4.jar) and replaced it with an
up-to-date version (postresql-9.3-1102-jdbc41.jar) appropriate to the
version of the PostgreSQL server offered through the standard OpenShift
cartridge.