avoid escaping special chars in CTest test output

CTest output parser already escapes special characters for XML, and the escape in the
Gaudi test runner was resulting in double escaping.

GaudiPolicy/python/GaudiTesting/Run.py

 # -*- coding: utf-8 -*-
 import os
 import sys
-import xml.sax.saxutils as XSS
 import BaseTest as GT
 import logging
 
@@ -49,7 +48,7 @@ def ctest_report(results):
         if key in ignore:
             continue
         hndlr = handler.get(key, id_handler)
-        data = XSS.escape(GT.sanitize_for_xml(hndlr(results[key])))
+        data = GT.sanitize_for_xml(hndlr(results[key]))
         sys.stdout.write(template.format(key, data))