Bug 1221386, checksums failing in 43.0b1, r=jlund DONTBUILD

--HG--
extra : source : d5bb596f28cd35ca5ef2a6ea8a7ee6351f01929a
extra : intermediate-source : 3b6702f55a1946e411fa2c3e3967ed7354b938d5

testing/mozharness/scripts/release/generate-checksums.py

@@ -243,7 +243,7 @@ class ChecksumsGenerator(BaseScript, VirtualenvMixin, SigningMixin, VCSMixin):
         UploadFiles(
             self.config["upload_user"],
             self.config["upload_host"],
-            "dummy",
+            None,
             files,
             ssh_key=self.config["upload_ssh_key"],
             base_path=dirs["abs_work_dir"],