Moved list_signal_test to pysidetest library.

This isolate the test case, and avoid other problems with X during the
buildbot compilation.

Reviewer: Lauro Moura <lauro.neto@openbossa.org>
          Hugo Parente Lima <hugo.pl@gmail.com>

tests/pysidetest/list_signal_test.py

@@ -0,0 +1,23 @@
+# -*- coding: utf-8 -*-
+
+import unittest
+from testbinding import TestObject
+from PySide.QtCore import QObject
+
+class ListConnectionTest(unittest.TestCase):
+
+    def childrenChanged(self, children):
+        self._child = children[0]
+
+    def testConnection(self):
+        o = TestObject(0)
+        c = QObject()
+        c.setObjectName("child")
+        self._child = None
+        o.childrenChanged.connect(self.childrenChanged)
+        o.addChild(c)
+        self.assertEquals(self._child.objectName(), "child")
+
+if __name__ == '__main__':
+    unittest.main()
+