make it so errors thrown in the lambda handler will output the type of the error in the response instead of a constant FunctionError

Author: benrosen78

Sources/AWSLambdaRuntime/LambdaRuntimeClient+ChannelHandler.swift

@@ -334,7 +334,7 @@ internal final class LambdaChannelHandler<Delegate: LambdaChannelHandlerDelegate
             self.reusableErrorBuffer!.clear()
         }
 
-        let errorResponse = ErrorResponse(errorType: Consts.functionError, errorMessage: "\(error)")
+        let errorResponse = ErrorResponse(errorType: "\(type(of: error))", errorMessage: "\(error)")
         // TODO: Write this directly into our ByteBuffer
         let bytes = errorResponse.toJSONBytes()
         self.reusableErrorBuffer!.writeBytes(bytes)

Sources/AWSLambdaRuntime/Utils.swift

@@ -24,7 +24,6 @@ enum Consts {
     static let postResponseURLSuffix = "/response"
     static let postErrorURLSuffix = "/error"
     static let postInitErrorURL = "\(apiPrefix)/runtime/init/error"
-    static let functionError = "FunctionError"
     static let initializationError = "InitializationError"
 }