Avoid ResourceWarning if shutdown failed for some reason (#272)

* Avoiding ResourceWarning if shutdown failed for some reason.
Typically it looks like this:
/home/user/.local/lib/python3.8/site-packages/ws4py/websocket.py:230: ResourceWarning: unclosed <ssl.SSLSocket fd=8, family=AddressFamily.AF_INET, type=SocketKind.SOCK_STREAM, proto=6, laddr=('10.200.11.18', 40248)>

* Update ws4py/websocket.py

Signed-off-by: Asif Saif Uddin <[email protected]>

---------

Signed-off-by: Asif Saif Uddin <[email protected]>
Co-authored-by: Vasily Zakharov <[email protected]>
Co-authored-by: Asif Saif Uddin <[email protected]>

ws4py/websocket.py

@@ -234,11 +234,14 @@ def close_connection(self):
         if self.sock:
             try:
                 self.sock.shutdown(socket.SHUT_RDWR)
+            except:
+                pass
+            try:
                 self.sock.close()
             except:
                 pass
-            finally:
-                self.sock = None
+            self.sock = None
+
 
     def ping(self, message):
         """