Prior to this commit, error handling methods would support various
arguments, including the exception being handled.
Our reference documentation would advise to create a new instance of a
`GraphQLError` using `GraphQLError.newError()`. This does not initialize
the location and path information of the current error.
This commit allows error handling methods to get injected with a
`GraphQlErrorBuilder<?>` argument that is initialized with the current
`DataFetchingEnvironment` (thus filling the location and path parts).
Fixes gh-1200
