The controller will retrieve all the endpoints at the beginning of its
loop. When changes need to be applied, the provider may need to query
the endpoints again. Allow the provider to skip the queries if its data was
cached.
* continue on controller loop error
* add logging in source
* use formatter on logChanges for endpoints
* fix log messages, log skipped records
* add logging in aws, uppercase the rest
* respect google dry run policy
* add ing/svc namespace/name on logging
* fix error logging on template failure
* fix bugs, propagate template error
* log if nothing is being updated, debug log skipped endpoints
* change zone-not-found logging order
* feat(plan): allow plans to be parameterized via policies
* fix(controller): set a policy in the controller tests
* chore: allow go tip to fail
* chore: update changelog to include policies
* fix(plan): store a pointer to changes
* fix(controller): don't get address of a pointer
* feat(google): add ability to apply changes generated from a plan
* feat(controller): first implementation of controller
* feat: allow to configure in-cluster and kubeconfig
* fix(controller): call RunOnce at the right time and in a loop
* feat(google): add dryRun attribute to Google DNS provider
* fix: use hosted zone id instead of DNS name
* fix(google): stupidly filter by A records for now
* feat: allow specifying the google project and zone
* feat: provide a dry-run flag which defaults to false
* chore: vendor new dependencies
* fix(config): fix failing tests for config object
* ref(controller): return plain value of ApplyChanges
* ref: simplify how to get a valid kubernetes client
