Remove incorrect jps variable definition suppression.

This is done for two reasons:
- it leads to the $jps variable being undefined. As a consequence, Tomcat no
  longer knows if it is running or not
- obm-deploy should not modify non-configuration files, especially not OBM's
Disable ask_pass option.

It prevents ssh-agent from working.
Only update configuration on master when no load balance.
Removes useless empty line.
Makes obm-db-pg depend on postgres.
Renames tasks with similar names.
PG config updates handled via handlers.
Makes Java alternatives and JPS work.

The issue was that installing openjdk-devel after Oracle's own RPM destroys the
alternatives. Therefore, openjdk-devel always needs to be installed first.