Add PostgreSQL JDBC to Tomcat

Summary:
Reference: https://doc.orbeon.com/form-runner/persistence/relational-db#mysql-application-server-setup

Ref T1884

Test Plan: Tested with D3123 and D3129

Reviewers: dereckson

Maniphest Tasks: T1884

Differential Revision: https://devcentral.nasqueron.org/D3131