make Path MTU Discovery resilient to random packet loss (#4545)

integrationtests/self/mtu_test.go

@@ -18,9 +18,7 @@ import (
 )
 
 var _ = Describe("DPLPMTUD", func() {
-	// This test is very sensitive to packet loss, as the loss of a single Path MTU probe packet makes DPLPMTUD
-	// clip the assumed MTU at that value.
-	It("discovers the MTU", FlakeAttempts(3), func() {
+	It("discovers the MTU", func() {
 		rtt := scaleDuration(5 * time.Millisecond)
 		const mtu = 1400