Integration test failure: "cbes.esWaitMs is already used for a different type of metric"

    13:33:39.289 [connector-main-3] ERROR com.couchbase.connector.cluster.consul.AsyncTask - Connector task exited early due to failure     java.lang.IllegalArgumentException: cbes.esWaitMs is already used for a different type of metric     	at com.codahale.metrics.MetricRegistry.getOrAdd(MetricRegistry.java:445) ~[metrics-core-4.0.3.jar:4.0.3]     	at com.codahale.metrics.MetricRegistry.gauge(MetricRegistry.java:255) ~[metrics-core-4.0.3.jar:4.0.3]     	at com.couchbase.connector.elasticsearch.Metrics.gauge(Metrics.java:83) ~[main/:?]     	at com.couchbase.connector.elasticsearch.ElasticsearchConnector.run(ElasticsearchConnector.java:167) ~[main/:?]     	at com.couchbase.connector.cluster.consul.WorkerServiceImpl.lambda$startStreaming$1(WorkerServiceImpl.java:111) ~[main/:?]     	at com.couchbase.connector.cluster.consul.AsyncTask.lambda$new$1(AsyncTask.java:68) ~[main/:?]     	at java.lang.Thread.run(Thread.java:748) [?:1.8.0_192]     13:33:39.294 [connector-main-3] ERROR com.couchbase.connector.cluster.consul.ConsulConnector - Got fatal error     java.lang.IllegalArgumentException: cbes.esWaitMs is already used for a different type of metric     	at com.codahale.metrics.MetricRegistry.getOrAdd(MetricRegistry.java:445) ~[metrics-core-4.0.3.jar:4.0.3]     	at com.codahale.metrics.MetricRegistry.gauge(MetricRegistry.java:255) ~[metrics-core-4.0.3.jar:4.0.3]     	at com.couchbase.connector.elasticsearch.Metrics.gauge(Metrics.java:83) ~[main/:?]     	at com.couchbase.connector.elasticsearch.ElasticsearchConnector.run(ElasticsearchConnector.java:167) ~[main/:?]     	at com.couchbase.connector.cluster.consul.WorkerServiceImpl.lambda$startStreaming$1(WorkerServiceImpl.java:111) ~[main/:?]     	at com.couchbase.connector.cluster.consul.AsyncTask.lambda$new$1(AsyncTask.java:68) ~[main/:?]