Default to using postgres if the SQL_FLAVOR env variable isn't set
Default to using postgres if the SQL_FLAVOR env variable isn't set

Signed-off-by: Nima Kaviani <0ebde517669f70c2aec92dc89d4950413b825ec0@us.ibm.com>

cloudfoundry-incubator/bbs,cloudfoundry-incubator/bbs