Misleading log statements in association controller

[david-kow]

The controller handling both Kibana and ES associations has logging statements that are confusing. E.g.:

cloud-on-k8s/pkg/controller/association/reconciler.go

Line 315 in 0d31c4a

r.log(association).Info("Updating spec with Elasticsearch association configuration")

cloud-on-k8s/pkg/controller/association/reconciler.go

Line 320 in 0d31c4a

r.log(association).Error(err, "Failed to update EnterpriseSearch association configuration")

This leads to logs similar to the below. Notice Kibana assoc logging about ES config.
{"log.level":"info","@timestamp":"2020-07-23T19:27:17.235Z","log.logger":"association.beat-kibana-association-controller","message":"Updating spec with Elasticsearch association configuration","service.version":"1.2.0-51ae5fd4","service.type":"eck","ecs.version":"1.4 .0","namespace":"monitoring","beat_name":"log"}

[sebgl]

Will be fixed as part of #3537.