Get all Reviews by a Spot's id

[wckliment]

Returns all the reviews that belong to a spot specified by id.

• Seed data exists in the database for reviews to be returned.
• Successful response includes only reviews for the specified spot
• Review data returned includes the id, userId, spotId, review,
  stars, createdAt, and updatedAt
• Review data returns associated data for User, including the id,
  firstName, and lastName
• Review data returns associated data for ReviewImages, an array of image
  data including the id and url
• Error response with status 404 is given when a spot does not exist with
  the provided id