Issue Description: As we use unauthenticated container image pulls from DockerHub, we are limited to a maximum of 100 pulls per IP address in a maximum 6 hour window. This can put us into the position where our environment is down, particularly in a period where our OSD cluster is being upgraded, because we can no longer pull the Postgres container from DockerHub due to rate limiting.

Acceptance Criteria: 

• Prevent the rate limiting of the Postgres container image by either:
  • Using an ImageStream for the Postgres Container
  • Using an AWS RDS Micro instance in our dev environment