Exception swallowed in "AndFieldValueGenerator"

In `AndFieldValueGenerator`, in the function
```
protected List generateCandidatesNotIncludingIntervalExtremes(int start, int end)
```
there is a try/catch which just logs the exception and returns an empty list.

```
Catched expected exception while generating candidates
com.cronutils.model.time.generator.NoSuchValueException: null
at com.cronutils.model.time.generator.AndFieldValueGenerator.generateNextValue(AndFieldValueGenerator.java:52)
at com.cronutils.model.time.generator.AndFieldValueGenerator.generateCandidatesNotIncludingIntervalExtremes(AndFieldValueGenerator.java:84)
at com.cronutils.model.time.generator.FieldValueGenerator.generateCandidates(FieldValueGenerator.java:61)
at com.cronutils.model.time.ExecutionTimeBuilder.forHoursMatching(ExecutionTimeBuilder.java:64)
at com.cronutils.model.time.ExecutionTime.forCron(ExecutionTime.java:53)
```

So I have a situation where a client generates cron expressions interactively using the parser, and expressions which are "valid" then generate completely unexpected results when used with the `ExecutionTime` class.

The exception is printed, but there is no way to guard against this behaviour because the exception is not propagated.

An example expression is `0 0 0-07,17-0 ? * SAT` which is parsed as `every hour between 0 and 7 and every hour between 17 and 0 at Saturday day`.

If this is expression is not usable, it should not be accepted by the parser. If that's too hard, at least when an `ExecutionTime` is created using a Cron which it can't use, an exception should be generated so it is possible to validate against that, and keep junk out of the system.