Server Installation Guide: Unify version of postgres jdbc driver

https://doc-stage.usersys.redhat.com/documentation/en-us/red_hat_single_sign-on/7.1/html-single/server_installation_and_configuration_guide/

In Chapter 6.2. Package the JDBC Driver there is a screenshot showing jdbc driver postgresql-9.4.1212.jar and in the following module.xml there is path postgresql-9.4.1208.jar.

It has to be same.