Suppress error handling for test coverage in push and merge scripts.

tools/push-to-trunk/test_scripts.py

 #!/usr/bin/env python
 # Copyright 2013 the V8 project authors. All rights reserved.
 # Redistribution and use in source and binary forms, with or without
 # modification, are permitted provided that the following conditions are
 # met:
 #
 #     * Redistributions of source code must retain the above copyright
 #       notice, this list of conditions and the following disclaimer.
 #     * Redistributions in binary form must reproduce the above
 #       copyright notice, this list of conditions and the following
@@ skipping 784 matching lines @@
       ["status -s -b -uno", "## some_branch\n"],
       ["svn fetch", ""],
       ["svn log -1 --oneline", "r100 | Text"],
       [("log -1 --format=%H --grep=\""
         "^Version [[:digit:]]*\.[[:digit:]]*\.[[:digit:]]* (based\""
         " svn/trunk"), "push_hash\n"],
       ["svn find-rev push_hash", "65"],
     ])
 
     auto_roll.AutoRoll(TEST_CONFIG, self).Run(
-        AUTO_ROLL_ARGS + ["--status-password", password])
+        AUTO_ROLL_ARGS + ["--status-password", password, "--push"])
 
     state = json.loads(FileToText("%s-state.json"
                                   % TEST_CONFIG[PERSISTFILE_BASENAME]))
 
     self.assertEquals("100", state["lkgr"])
     self.assertEquals("100", state["latest"])
 
   def testAutoRollStoppedBySettings(self):
     TEST_CONFIG[DOT_GIT_LOCATION] = self.MakeEmptyTempFile()
     TEST_CONFIG[SETTINGS_LOCATION] = self.MakeEmptyTempFile()
@@ skipping 172 matching lines @@
 
 Review URL: https://codereview.chromium.org/83173002
 
 ------------------------------------------------------------------------""")
     self.assertEquals(
 """Prepare push to trunk.  Now working on version 3.23.11.
 
 R=danno@chromium.org
 
 Committed: https://code.google.com/p/v8/source/detail?r=17997""", body)