allow custom multithread name (#4)

Co-authored-by: nggit <12218311+nggit@users.noreply.github.com>

asyncutor/__init__.py

@@ -118,8 +118,8 @@ def shutdown(self):
 
 
 class MultiThreadExecutor(ThreadExecutor):
-    def __init__(self, size=10, loop=None):
-        super().__init__(loop=loop, name='MultiThreadExecutor')
+    def __init__(self, size=10, loop=None, name='MultiThreadExecutor'):
+        super().__init__(loop=loop, name=name)
 
         self.size = size
         self._threads = {}