Remove asterisk on destructured args

Otherwise we would create a tuple containing
a tuple of arguments and an empty tuple.

system_repository.py

@@ -6,7 +6,7 @@ class SystemRepository():
         self.stdout = [""]
         self.stderr = [""]
 
-    def run(self, *args):
+    def run(self, args):
         stream = sub.Popen(args,
                            stdout=sub.PIPE,
                            stderr=sub.PIPE,