isValidInteger validator always return true

[dod38fr]

The following call returns true instead of false:

 esapi.validator().isValidInteger("Integer", 500, false, 1, 99);

The problem comes from:

• DefaultValidator.isValidInteger calls DefaultValidator.getValidInteger
• DefaultValidator.getValidInteger calls BaseValidationRule.getValid
• getValid calls getValidInput, but all validation exceptions are catched to call this.sanitize which returns the input instead of false, hence isValidInteger always return true