time() failed to parse string containing single digit h/m/s

```
(root@nebula) [(none)]> return time("11:34:2")
+-----------------+
| time("11:34:2") |
+-----------------+
| BAD_DATA        |
+-----------------+
```
neo4j result:
![Screen Shot 2021-07-19 at 4 45 05 PM](https://user-images.githubusercontent.com/18348405/126130977-eff2cc9e-430d-4af1-bb87-98d522d0b73d.png)
