python.pkgs.urllib3: disable tests

FRidh · FRidh · commit 476086929af7 · 2017-05-27T17:52:20.000+02:00
because there are transient failures too often.
diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
@@ -6295,6 +6295,8 @@ in {
       nosetests -v --cover-min-percentage 1
     '';
 
+    doCheck = false;
+
     buildInputs = with self; [ coverage tornado mock nose psutil pysocks ];
 
     meta = {
