fix tests affected by refreshGracePeriod

A couple tests require lowering the grace period to keep the test from
taking the full 30s timeout.

The Retry_hang test also needed to be removed from the Parallel group,
becuase it modifies the global refreshGracePeriod variable.

helper/resource/state_test.go

@@ -147,6 +147,12 @@ func TestWaitForState_inconsistent_negative(t *testing.T) {
 }
 
 func TestWaitForState_timeout(t *testing.T) {
+	old := refreshGracePeriod
+	refreshGracePeriod = 5 * time.Millisecond
+	defer func() {
+		refreshGracePeriod = old
+	}()
+
 	conf := &StateChangeConf{
 		Pending: []string{"pending", "incomplete"},
 		Target:  []string{"running"},

helper/resource/wait_test.go

@@ -54,14 +54,18 @@ func TestRetry_timeout(t *testing.T) {
 }
 
 func TestRetry_hang(t *testing.T) {
-	t.Parallel()
+	old := refreshGracePeriod
+	refreshGracePeriod = 50 * time.Millisecond
+	defer func() {
+		refreshGracePeriod = old
+	}()
 
 	f := func() *RetryError {
 		time.Sleep(2 * time.Second)
 		return nil
 	}
 
-	err := Retry(1*time.Second, f)
+	err := Retry(50*time.Millisecond, f)
 	if err == nil {
 		t.Fatal("should error")
 	}