nosetest failed for pandas 0.16.0
Hi there,

I recently upgraded pandas from 0.15.1 to 0.16.0.  after running the nosetest i got the following error msgs.  wondering if anything series (i tested HDF5 writing/reading.  everything looks normal).
# 
## ERROR: test_conv_read_write (pandas.io.tests.test_pytables.TestHDFStore)

Traceback (most recent call last):
  File "/usr/local/lib/python3.4/site-packages/pandas/io/tests/test_pytables.py", line 205, in test_conv_read_write
    assert_series_equal(o, roundtrip('series',o))
  File "/usr/local/lib/python3.4/site-packages/pandas/io/tests/test_pytables.py", line 201, in roundtrip
    obj.to_hdf(self.path, key,*_kwargs)
  File "/usr/local/lib/python3.4/site-packages/pandas/core/generic.py", line 913, in to_hdf
    return pytables.to_hdf(path_or_buf, key, self, *_kwargs)
  File "/usr/local/lib/python3.4/site-packages/pandas/io/pytables.py", line 266, in to_hdf
    complib=complib) as store:
  File "/usr/local/lib/python3.4/site-packages/pandas/io/pytables.py", line 396, in **init**
    self.open(mode=mode, *_kwargs)
  File "/usr/local/lib/python3.4/site-packages/pandas/io/pytables.py", line 536, in open
    self._handle = tables.open_file(self._path, 'r', *_kwargs)
  File "/usr/local/lib/python3.4/site-packages/tables/file.py", line 318, in open_file
    return File(filename, mode, title, root_uep, filters, *_kwargs)
  File "/usr/local/lib/python3.4/site-packages/tables/file.py", line 791, in **init**
    self._g_new(filename, mode, *_params)
  File "hdf5extension.pyx", line 359, in tables.hdf5extension.File._g_new (tables/hdf5extension.c:3756)
  File "/usr/local/lib/python3.4/site-packages/tables/utils.py", line 157, in check_file_access
    raise IOError("`%s` does not exist" % (filename,))
nose.proxy.OSError: ``tmp.__5JMnSD5gVu__.h5`` does not exist
-------------------- >> begin captured stdout << ---------------------
Opening tmp.**5JMnSD5gVu**.h5 in read-only mode

--------------------- >> end captured stdout << ----------------------
# 
## ERROR: test_copy (pandas.io.tests.test_pytables.TestHDFStore)

Traceback (most recent call last):
  File "/usr/local/lib/python3.4/site-packages/pandas/io/tests/test_pytables.py", line 4331, in test_copy
    st = HDFStore(self.path)
  File "/usr/local/lib/python3.4/site-packages/pandas/io/pytables.py", line 396, in **init**
    self.open(mode=mode, *_kwargs)
  File "/usr/local/lib/python3.4/site-packages/pandas/io/pytables.py", line 536, in open
    self._handle = tables.open_file(self._path, 'r', *_kwargs)
  File "/usr/local/lib/python3.4/site-packages/tables/file.py", line 318, in open_file
    return File(filename, mode, title, root_uep, filters, *_kwargs)
  File "/usr/local/lib/python3.4/site-packages/tables/file.py", line 791, in **init**
    self._g_new(filename, mode, *_params)
  File "hdf5extension.pyx", line 359, in tables.hdf5extension.File._g_new (tables/hdf5extension.c:3756)
  File "/usr/local/lib/python3.4/site-packages/tables/utils.py", line 157, in check_file_access
    raise IOError("`%s` does not exist" % (filename,))
nose.proxy.OSError: ``tmp.__NZTYQk5IW2__.h5`` does not exist
-------------------- >> begin captured stdout << ---------------------
Opening tmp.**NZTYQk5IW2**.h5 in read-only mode

--------------------- >> end captured stdout << ----------------------
# 
## ERROR: test_factory_fun (pandas.io.tests.test_pytables.TestHDFStore)

Traceback (most recent call last):
  File "/usr/local/lib/python3.4/site-packages/pandas/io/tests/test_pytables.py", line 160, in test_factory_fun
    with get_store(self.path) as tbl:
  File "/usr/local/lib/python3.4/site-packages/pandas/io/pytables.py", line 1273, in get_store
    return HDFStore(path, *_kwargs)
  File "/usr/local/lib/python3.4/site-packages/pandas/io/pytables.py", line 396, in **init**
    self.open(mode=mode, *_kwargs)
  File "/usr/local/lib/python3.4/site-packages/pandas/io/pytables.py", line 536, in open
    self._handle = tables.open_file(self._path, 'r', *_kwargs)
  File "/usr/local/lib/python3.4/site-packages/tables/file.py", line 318, in open_file
    return File(filename, mode, title, root_uep, filters, *_kwargs)
  File "/usr/local/lib/python3.4/site-packages/tables/file.py", line 791, in __init__
    self._g_new(filename, mode, **params)
  File "hdf5extension.pyx", line 359, in tables.hdf5extension.File._g_new (tables/hdf5extension.c:3756)
  File "/usr/local/lib/python3.4/site-packages/tables/utils.py", line 157, in check_file_access
    raise IOError("`%s` does not exist" % (filename,))
nose.proxy.OSError: ``tmp.__lL9hBPXiYa__.h5`` does not exist
-------------------- >> begin captured stdout << ---------------------
Opening tmp.**lL9hBPXiYa**.h5 in read-only mode

--------------------- >> end captured stdout << ----------------------

my python/pandas environment (Redhat server v6.5):

certifi (14.05.14)
Cython (0.21.1)
ipython (2.3.1)
jieba3k (0.35.1)
Jinja2 (2.7.3)
lxml (3.4.0)
MarkupSafe (0.23)
matplotlib (1.4.2)
mysql-connector-python (2.0.2)
nltk (3.0.1)
nose (1.3.4)
numexpr (2.4)
numpy (1.8.2)
openpyxl (1.6.1)
oursql (0.9.4)
pandas (0.16.0)
patsy (0.3.0)
pip (1.5.6)
pyparsing (2.0.3)
pyreadline (2.0)
python-dateutil (2.2)
pytz (2014.9)
pyzmq (14.4.1)
scipy (0.14.0)
setuptools (2.1)
six (1.8.0)
SQLAlchemy (0.9.8)
statsmodels (0.6.0)
tables (3.1.1)
tornado (4.0.2)
xlrd (0.9.3)
