Increase max_connections/shared_buffers for postgres in integration
Increase max_connections/shared_buffers for postgres in integration

[#156865602](https://www.pivotaltracker.com/story/show/156865602)

Co-authored-by: Josh Russett <51387f2e18a282e19bf73e3a4ebd17eb7c8325fd@pivotal.io>

barthy1/bosh,barthy1/bosh,barthy1/bosh,barthy1/bosh