[yt-dev] Issue #620: yt 2.5.4 does not install (missing data_objects/tests directory) (yt_analysis/yt)

[astrofrog]

New issue 620: yt 2.5.4 does not install (missing data_objects/tests directory)
https://bitbucket.org/yt_analysis/yt/issue/620/yt-254-does-not-install-missing

astrofrog:

I tried installing yt 2.5.4 using the tarball from PyPI but I get the following error:


```
Traceback (most recent call last):
  File "setup.py", line 280, in <module>
    setup_package()
  File "setup.py", line 275, in setup_package
    'build_src': my_build_src, 'install_data': my_install_data},
  File "/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/numpy/distutils/core.py", line 152, in setup
    config = configuration()
  File "setup.py", line 231, in configuration
    config.add_subpackage('yt', 'yt')
  File "/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/numpy/distutils/misc_util.py", line 1003, in add_subpackage
    caller_level = 2)
  File "/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/numpy/distutils/misc_util.py", line 972, in get_subpackage
    caller_level = caller_level + 1)
  File "/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/numpy/distutils/misc_util.py", line 909, in _get_configuration_from_setup_py
    config = setup_module.configuration(*args)
  File "yt/setup.py", line 11, in configuration
    config.add_subpackage('data_objects')
  File "/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/numpy/distutils/misc_util.py", line 1003, in add_subpackage
    caller_level = 2)
  File "/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/numpy/distutils/misc_util.py", line 972, in get_subpackage
    caller_level = caller_level + 1)
  File "/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/numpy/distutils/misc_util.py", line 909, in _get_configuration_from_setup_py
    config = setup_module.configuration(*args)
  File "yt/data_objects/setup.py", line 12, in configuration
    config.add_subpackage("tests")
  File "/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/numpy/distutils/misc_util.py", line 1003, in add_subpackage
    caller_level = 2)
  File "/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/numpy/distutils/misc_util.py", line 965, in get_subpackage
    caller_level = caller_level+1)
  File "/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/numpy/distutils/misc_util.py", line 744, in __init__
    raise ValueError("%r is not a directory" % (package_path,))
ValueError: 'yt/data_objects/tests' is not a directory
```