Added cadvisor test suite to flag info message

The cadvisor test suite is not mentioned in the remote runner's
`--test-suite` flag.
This PR will mention the existence of the cadvisor test suite.

Author: alejandrox1

test/e2e_node/runner/remote/run_remote.go

@@ -48,7 +48,7 @@ import (
 )
 
 var testArgs = flag.String("test_args", "", "Space-separated list of arguments to pass to Ginkgo test runner.")
-var testSuite = flag.String("test-suite", "default", "Test suite the runner initializes with. Currently support default|conformance")
+var testSuite = flag.String("test-suite", "default", "Test suite the runner initializes with. Currently support default|cadvisor|conformance")
 var instanceNamePrefix = flag.String("instance-name-prefix", "", "prefix for instance names")
 var zone = flag.String("zone", "", "gce zone the hosts live in")
 var project = flag.String("project", "", "gce project the hosts live in")
@@ -196,7 +196,7 @@ func main() {
 		// Use node e2e suite by default if no subcommand is specified.
 		suite = remote.InitNodeE2ERemote()
 	default:
-		klog.Fatalf("--test-suite must be one of default or conformance")
+		klog.Fatalf("--test-suite must be one of default, cadvisor, or conformance")
 	}
 
 	rand.Seed(time.Now().UnixNano())