Set lock_path to a tempdir in TestLockCleanup

Fixes bug #945363

Change-Id: I2e2b81eebbfce0c10e431041f6b9d45bcf26f1c0

nova/tests/test_utils.py

@@ -20,6 +20,7 @@
 import os
 import os.path
 import socket
+import shutil
 import StringIO
 import tempfile
 
@@ -828,6 +829,8 @@ def setUp(self):
 
         self.pid = os.getpid()
         self.dead_pid = self._get_dead_pid()
+        self.tempdir = tempfile.mkdtemp()
+        self.flags(lock_path=self.tempdir)
         self.lock_name = 'nova-testlock'
         self.lock_file = os.path.join(FLAGS.lock_path,
                                       self.lock_name + '.lock')
@@ -839,6 +842,10 @@ def setUp(self):
             if errno == 2:
                 pass
 
+    def tearDown(self):
+        shutil.rmtree(self.tempdir)
+        super(TestLockCleanup, self).tearDown()
+
     def _get_dead_pid(self):
         """get a pid for a process that does not exist"""