Revert "Clean up exception handling in TestON core"

It looks like the test may hang sometimes after it has completed 

This reverts commit 1de6c19da7b6265009f1b3401276dee99ed6cac3.

Change-Id: I475f52ae7b72f747af5a5fbd4440fc74f48e4c9e
diff --git a/TestON/core/xmldict.py b/TestON/core/xmldict.py
index 8d1dcf4..2cc47da 100644
--- a/TestON/core/xmldict.py
+++ b/TestON/core/xmldict.py
@@ -37,7 +37,7 @@
         root = ElementTree.XML(root_or_str)
     try :
         return {root.tag: _from_xml(root, strict)}
-    except StandardError:
+    except Exception:
         return None
 
 def dict_to_xml(dict_xml):