Fix 2.6 python tests

Use `unittest2` module for Python 2.6 tests. Ignore duplicates in imports
and add the requirement to the `setup.py` file.

1 files changed, 1 insertions, 0 deletions

diff --git a/setup.py b/setup.py
index 9abb308..3b1540d 100644
--- a/setup.py
+++ b/setup.py
@@ -47,6 +47,7 @@ setup(
             'xnt = xnt.xenant:main',
         ],
     },
+    tests_require=['unittest2',],
     install_requires=['setuptools',],
     classifiers=[
         'Development Status :: 4 - Beta',