Card online_runtime_157

Provide PostgreSQL 9.2 via SCL for RHEL

- Rename $OPENSHIFT_POSTGRES_VERSION to $OPENSHIFT_POSTGRESQL_VERSION
  for consistency
- Bump cartridge version to 0.3.0.
- Tweak rhcsh for 9.2-compatibility
- Internal changes in openshift-origin-cartridge-postgresql.spec
Update $OPENSHIFT_POSTGRES_VERSION for existing cartridges
No need for Ruby SCL here.
Match up "Provides" with what's overridden
There is no Group-Overrides needed
Conflicts: is obsolete.
Merge pull request #2925 from BanzaiMan/dev/hasari/c157

Merged by openshift-bot