Hasher.validateSalt(salt) is underutilized

[pogren]

Describe the bug
The various impls of Hasher (e.g. HashCodeHasher and ModHashCodeHasher) have constructors that take salt parameters that aren't validated. So you can do something like:

ModHashCodeHasher hasher = new ModHashCodeHasher(200, "42");

but you can't subsequently call

hasher.setSalt("42");

because that calls

Hasher.validateSalt("42");

which returns false.

Seems like this is inconsistent and should be remedied by having constructors that take a salt value call the validateSalt method.

System information:

• Tribuo Version: 4.2.x