mark TestExpDecaySampleNanosecondRegression flaky (#1163)

metrics/sample_test.go

@@ -3,6 +3,7 @@ package metrics
 import (
 	"math"
 	"math/rand"
+	"os"
 	"runtime"
 	"testing"
 	"time"
@@ -132,6 +133,9 @@ func TestExpDecaySample(t *testing.T) {
 // The priority becomes +Inf quickly after starting if this is done,
 // effectively freezing the set of samples until a rescale step happens.
 func TestExpDecaySampleNanosecondRegression(t *testing.T) {
+	if os.Getenv("RUN_FLAKY_TESTS") != "true" {
+		t.Skip("FLAKY")
+	}
 	sw := NewExpDecaySample(100, 0.99)
 	for i := 0; i < 100; i++ {
 		sw.Update(10)