Bug when validating schema with "multipleOf" field

[slinkydeveloper]

Bug in NumericUtils.NumericType

Description

When you try to load a path parameter (I think in general a scheme) with "multipleOf" field, it fails in a ExceptionInInitializerError inside NumericUtils.zero()

Steps to reproduce

Try to load and validate a spec with a path like this:

/pets/{petId}:
    get:
      summary: Info for a specific pet
      operationId: showPetById
      tags:
        - pets
      parameters:
        - name: petId
          in: path
          required: true
          description: The id of the pet to retrieve
          schema:
            type: integer
            multipleOf: 1.0

[andylowry]

@slinkydeveloper Sorry for delay - I finally (literally yesterday) got to a point in my other work that had to take precedence over this. I hope to be more responsive going forward.

Thanks for the fix. I'm surprised this bug didn't show up earlier - NumericUtils methods are all unusable because of it. The fix looks good. Will merge it now.