Move Autotest to /usr/local/autotest and fix hard-coded autodir paths in client tests.

client/site_tests/realtimecomm_GTalkAudioPlayground/realtimecomm_GTalkAudioPlayground.py

 # Copyright (c) 2010 The Chromium OS Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 import os, re, shutil, sys, time
 
 from autotest_lib.client.bin import test, utils
 from autotest_lib.client.common_lib import error
 from autotest_lib.client.cros import cros_ui
 
 WARMUP_TIME = 30
 SLEEP_DURATION = 90
 
 class realtimecomm_GTalkAudioPlayground(test.test):
     version = 1
-    playground = '/home/autotest/playground'
     dep = 'realtimecomm_playground'
 
     def setup(self):
+        self.playground = os.path.join(self.autodir, 'playground')
         self.job.setup_dep([self.dep])
 
 
     def run_verification(self):
         if not os.path.exists('/tmp/tmp.log'):
             raise error.TestFail('GTalk log file not exist!')
         content = utils.read_file('/tmp/tmp.log')
         if not "voice state, recv=1 send=1" in content:
             raise error.TestFail('Error in Audio send/recv!')
 
@@ skipping 51 matching lines @@
         # Verify log
         try:
             self.run_verification()
         finally:
             pgutil.cleanup_playground(self.playground, True)
 
         # Report perf
         self.write_perf_keyval(self.performance_results)
 
         session.close()