Scale trelawney to 4 log-api instances
Scale trelawney to 4 log-api instances

- the [CF docs](https://docs.cloudfoundry.org/concepts/high-availability.html#horiz-scaling) state that 2 instances are required per AZ, just like
doppler

[#168185264](https://www.pivotaltracker.com/story/show/168185264)

Co-authored-by: Weyman Fung <4ab5e17be5c5cdce6cf54d6174afda06421ccec1@pivotal.io>

cloudfoundry/cf-deployment,cloudfoundry/cf-deployment