Update links to multi30k dataset since original servers are down (#2194)

* Update multi30k.py

* Update test dataset hash

Author: Nayef211

torchtext/datasets/multi30k.py

@@ -11,16 +11,17 @@
     _create_dataset_directory,
 )
 
+# TODO: Update URL to original once the server is back up (see https://github.com/pytorch/text/issues/1756)
 URL = {
-    "train": "http://www.quest.dcs.shef.ac.uk/wmt16_files_mmt/training.tar.gz",
-    "valid": "http://www.quest.dcs.shef.ac.uk/wmt16_files_mmt/validation.tar.gz",
-    "test": "http://www.quest.dcs.shef.ac.uk/wmt16_files_mmt/mmt16_task1_test.tar.gz",
+    "train": r"https://raw.githubusercontent.com/neychev/small_DL_repo/master/datasets/Multi30k/training.tar.gz",
+    "valid": r"https://raw.githubusercontent.com/neychev/small_DL_repo/master/datasets/Multi30k/validation.tar.gz",
+    "test": r"https://raw.githubusercontent.com/neychev/small_DL_repo/master/datasets/Multi30k/mmt16_task1_test.tar.gz",
 }
 
 MD5 = {
     "train": "20140d013d05dd9a72dfde46478663ba05737ce983f478f960c1123c6671be5e",
     "valid": "a7aa20e9ebd5ba5adce7909498b94410996040857154dab029851af3a866da8c",
-    "test": "0681be16a532912288a91ddd573594fbdd57c0fbb81486eff7c55247e35326c2",
+    "test": "6d1ca1dba99e2c5dd54cae1226ff11c2551e6ce63527ebb072a1f70f72a5cd36",
 }
 
 _PREFIX = {