1022622: Modifies --no-overlap to show pools which provide products not ...

...already covered.
I would do the following:

```
def _is_int(num):
    try:
        return str(num) == str(int(num))
    except:
        return False
```
```_is_int(10)``` returns True
```_is_int('10')``` returns True
```_is_int('abc')``` returns False
```_is_int(None)``` returns False