Revert 7581, you can't have try except finally toghetter until python 2.5

tools/test.py

Index: tools/test.py
===================================================================
--- tools/test.py	(revision 7582)
+++ tools/test.py	(working copy)
@@ -117,8 +117,6 @@
         start = time.time()
         output = case.Run()
         case.duration = (time.time() - start)
-      except BreakNowException:
-        self.terminate = True
       except IOError, e:
         assert self.terminate
         return
@@ -320,13 +318,7 @@
 # --- F r a m e w o r k ---
 # -------------------------
 
-class BreakNowException(Exception):
-  def __init__(self, value):
-    self.value = value
-  def __str__(self):
-    return repr(self.value)
 
-
 class CommandOutput(object):
 
   def __init__(self, exit_code, timed_out, stdout, stderr):
@@ -387,12 +379,9 @@
 
   def Run(self):
     self.BeforeRun()
-    result = None;
+    result = "exception"
     try:
       result = self.RunCommand(self.GetCommand())
-    except:
-      self.terminate = True;
-      raise BreakNowException("Used pressed CTRL+C or IO went wrong")
     finally:
       self.AfterRun(result)
     return result
@@ -713,12 +702,7 @@
 
 def RunTestCases(cases_to_run, progress, tasks):
   progress = PROGRESS_INDICATORS[progress](cases_to_run)
-  result = 0;
-  try:
-    result = progress.Run(tasks)
-  except Exception, e:
-    print "\n", e
-  return result
+  return progress.Run(tasks)
 
 
 def BuildRequirements(context, requirements, mode, scons_flags):