Allow ViMbAdmin PostgreSQL connection

Summary:
Cluster: db-A
User: mailManagement
Source: docker-002 (172.27.27.5)

The application uses Doctrine as DBAL. Out of the box,
SCRAM authentication isn't currently supported.

Test Plan: ViMbAdmin doesn't fail on a pg_hba connection error.

Reviewers: dereckson

Reviewed By: dereckson

Differential Revision: https://devcentral.nasqueron.org/D3323