Adds filtering of hosts to DialContexts.

The provided DialContext wraps existing clients' DialContext in an attempt to
preserve any existing timeout configuration. In some cases, we may replace
infinite timeouts with golang defaults.

- scaleio: tcp connect/keepalive values changed from 0/15 to 30/30
- storageos: no change

pkg/controller/volume/attachdetach/attach_detach_controller_test.go

@@ -55,6 +55,7 @@ func Test_NewAttachDetachController_Positive(t *testing.T) {
 		false,
 		5*time.Second,
 		DefaultTimerConfig,
+		nil, /* filteredDialOptions */
 	)
 
 	// Assert
@@ -175,7 +176,9 @@ func attachDetachRecoveryTestCase(t *testing.T, extraPods1 []*v1.Pod, extraPods2
 		prober,
 		false,
 		1*time.Second,
-		DefaultTimerConfig)
+		DefaultTimerConfig,
+		nil, /* filteredDialOptions */
+	)
 
 	if err != nil {
 		t.Fatalf("Run failed with error. Expected: <no error> Actual: <%v>", err)