Fix more threading API related bugs: Thread.get_name() --> Thread.name.

Seen when setting RPCHandler.debugging=True
diff --git a/Lib/idlelib/rpc.py b/Lib/idlelib/rpc.py
index d4af81d..5d5bcf7 100644
--- a/Lib/idlelib/rpc.py
+++ b/Lib/idlelib/rpc.py
@@ -106,7 +106,7 @@
             erf = sys.__stderr__
             print('\n' + '-'*40, file=erf)
             print('Unhandled server exception!', file=erf)
-            print('Thread: %s' % threading.current_thread().get_name(), file=erf)
+            print('Thread: %s' % threading.current_thread().name, file=erf)
             print('Client Address: ', client_address, file=erf)
             print('Request: ', repr(request), file=erf)
             traceback.print_exc(file=erf)
@@ -149,7 +149,7 @@
     def debug(self, *args):
         if not self.debugging:
             return
-        s = self.location + " " + str(threading.current_thread().get_name())
+        s = self.location + " " + str(threading.current_thread().name)
         for a in args:
             s = s + " " + str(a)
         print(s, file=sys.__stderr__)