TestMutationHTTPToHTTPS flaky

[pebrc]

=== RUN   TestMutationHTTPToHTTPS/ES_services_should_have_endpoints#01
Retries (5m0s timeout): ....................................................................................................
{"log.level":"error","@timestamp":"2020-03-19T14:58:30.047Z","message":"stopping early","service.version":"0.0.0-00000000","service.type":"eck","ecs.version":"1.4.0","error":"test failure","error.stack_trace":"github.com/go-logr/zapr.(*zapLogger).Error\n\t/go/pkg/mod/github.com/go-logr/zapr@v0.1.0/zapr.go:128\ngithub.com/elastic/cloud-on-k8s/test/e2e/test.StepList.RunSequential\n\t/go/src/github.com/elastic/cloud-on-k8s/test/e2e/test/step.go:42\ngithub.com/elastic/cloud-on-k8s/test/e2e/test.RunMutations\n\t/go/src/github.com/elastic/cloud-on-k8s/test/e2e/test/run_mutation.go:37\ngithub.com/elastic/cloud-on-k8s/test/e2e/test.RunMutation\n\t/go/src/github.com/elastic/cloud-on-k8s/test/e2e/test/run_mutation.go:78\ngithub.com/elastic/cloud-on-k8s/test/e2e/es.TestMutationHTTPToHTTPS\n\t/go/src/github.com/elastic/cloud-on-k8s/test/e2e/es/mutation_test.go:35\ntesting.tRunner\n\t/usr/local/go/src/testing/testing.go:909"}
    --- FAIL: TestMutationHTTPToHTTPS/ES_services_should_have_endpoints#01 (300.00s)
        utils.go:83: 
            	Error Trace:	utils.go:83
            	Error:      	Received unexpected error:
            	            	2 addresses found for endpoint test-mutation-http-to-https-2slx-es-http, expected 3
            	Test:       	TestMutationHTTPToHTTPS/ES_services_should_have_endpoints#01

[sebgl]

Pretty sure that's fixed with #2740.
Let's close and reopen if needed.