BUG: Update Default recipe picture

[SandraBergstrom]

When trying to update a recipe with an uploade picture instead of the default placeholder, it will not update.

[SandraBergstrom]

When fixing #25 I instead created this bug. I have now removed the if statment again. I then updated the recipe model and removed the placholder variable and instead added a placeholder image on cloudinary which I directly link to as default in the featured_image field.

Now the following is working fine:

• Default image is showing if no image is uploaded
• When updating recipe with an uploaded image the new image is showing instead of the default image.