Postgresql still can be accessed via DB driver after postgresql stop
for jboss app

https://bugzilla.redhat.com/show_bug.cgi?id=1081796
Create one jboss app(e.g., myjbosseap6), embedded with postgresql-8.4 db
cartridge and add postgresql.jsp into src/main/webapp of local repo, ant
then git push. Access
http://$appname-$domainname.int.rhcloud.com/postgresql.jsp after
postgresql stop, found it still can be accessed, restart jbosseap app,
found it still works.