fixed broken test / code

   - Parcel is a post but internal 'all' code sets it as a 'GET'
   - Parcel all also did not wrap arguments correctly had to pass  { parcel: args } to resolver.
   - If request handler sees a payload it will force a 'POST'
   - capitalized all methods for request (standardizing)

Test changes

   - parcel required argument (width, length, height, weight)
   - test was expecting result to an array.. changed it to expect single Parcel object.