Refcounting isn't available in Jython. Putting the jython test around it.

This closes patch "[ #490414 ] Jython and test_socket".

Lib/test/test_socket.py

@@ -90,14 +90,15 @@ if hasattr(socket, 'getservbyname'):
     except socket.error:
         pass
 
-try:
-    # On some versions, this loses a reference
-    import sys
-    orig = sys.getrefcount(__name__)
-    socket.getnameinfo(__name__,0)
-except SystemError:
-    if sys.getrefcount(__name__) <> orig:
-        raise TestFailed,"socket.getnameinfo loses a reference"
+import sys
+if not sys.platform.startswith('java'):
+    try:
+        # On some versions, this loses a reference
+        orig = sys.getrefcount(__name__)
+        socket.getnameinfo(__name__,0)
+    except SystemError:
+        if sys.getrefcount(__name__) <> orig:
+            raise TestFailed,"socket.getnameinfo loses a reference"
 
 try:
     # On some versions, this crashes the interpreter.