ntpq: correct number of seconds in an hour

closes #2256

plugins/inputs/ntpq/ntpq.go

@@ -136,7 +136,7 @@ func (n *NTPQ) Gather(acc telegraf.Accumulator) error {
 							continue
 						}
 						// seconds in an hour
-						mFields[key] = int64(m) * 360
+						mFields[key] = int64(m) * 3600
 						continue
 					case strings.HasSuffix(when, "d"):
 						m, err := strconv.Atoi(strings.TrimSuffix(fields[index], "d"))

plugins/inputs/ntpq/ntpq_test.go

@@ -171,7 +171,7 @@ func TestHoursNTPQ(t *testing.T) {
 	assert.NoError(t, n.Gather(&acc))
 
 	fields := map[string]interface{}{
-		"when":   int64(720),
+		"when":   int64(7200),
 		"poll":   int64(256),
 		"reach":  int64(37),
 		"delay":  float64(51.016),