Fixes unrecognized selector for 'taskIdentifier' and 'originalRequest' methods

- Adds 'taskIdentifier' and 'originalRequest' methods for SessionUploadTask
and SessionDownloadTask

Author: nebiros

DVR/SessionDataTask.swift

@@ -34,7 +34,6 @@ final class SessionDataTask: URLSessionDataTask {
       return _originalRequest
     }
 
-
     // MARK: - Initializers
 
     init(session: Session, request: URLRequest, completion: (Completion)? = nil) {

DVR/SessionDownloadTask.swift

@@ -1,3 +1,5 @@
+private var globalTaskIdentifier: Int = 100000
+
 final class SessionDownloadTask: URLSessionDownloadTask {
 
     // MARK: - Types
@@ -10,6 +12,18 @@ final class SessionDownloadTask: URLSessionDownloadTask {
     let request: URLRequest
     let completion: Completion?
 
+    var _taskIdentifier: Int = {
+      globalTaskIdentifier += 1
+      return globalTaskIdentifier
+    }()
+    override var taskIdentifier: Int {
+      return _taskIdentifier
+    }
+
+    var _originalRequest: URLRequest?
+    override var originalRequest: URLRequest? {
+      return _originalRequest
+    }
 
     // MARK: - Initializers
 

DVR/SessionUploadTask.swift

@@ -1,3 +1,5 @@
+private var globalTaskIdentifier: Int = 100000
+
 final class SessionUploadTask: URLSessionUploadTask {
 
     // MARK: - Types
@@ -11,6 +13,19 @@ final class SessionUploadTask: URLSessionUploadTask {
     let completion: Completion?
     let dataTask: SessionDataTask
 
+    var _taskIdentifier: Int = {
+      globalTaskIdentifier += 1
+      return globalTaskIdentifier
+    }()
+    override var taskIdentifier: Int {
+      return _taskIdentifier
+    }
+
+    var _originalRequest: URLRequest?
+    override var originalRequest: URLRequest? {
+      return _originalRequest
+    }
+
     // MARK: - Initializers
 
     init(session: Session, request: URLRequest, completion: Completion? = nil) {