Typo, loggregator is misspelled as loggergator

[madamkiwi]

https://github.com/cloudfoundry-incubator/eirini/blob/1d06a7f96d97d9dbac27860b784fed2e5ff9d7d3/models.go#L54

https://github.com/cloudfoundry-community/eirini-bosh-release/blob/master/jobs/opi/templates/opi.yml.erb#L18

We'd just make a PR to fix this, but it would have to be two separate PRs with a dependency so we thought it might be easier for you to just fix and push.

[jenspinney]

Maybe we should leave this fix to the Eirini team and then this repo just reacts to the change if the core eirini team fixes it?