Skip tests that fail with newer versions of Python.

Patch copied from Gentoo:

https://gitweb.gentoo.org/repo/gentoo.git/tree/dev-python/unittest2/files/unittest2-1.1.0-python3.5-test.patch

diff --git a/unittest2/test/test_loader.py b/unittest2/test/test_loader.py
index 683f662..347eea5 100644
--- a/unittest2/test/test_loader.py
+++ b/unittest2/test/test_loader.py
@@ -509,6 +509,7 @@ class Test_TestLoader(unittest2.TestCase):
     #
     # What happens when an impossible name is given, relative to the provided
     # `module`?
+    @unittest.skipIf(sys.version_info[:2] >= (3, 5), "python 3.5 has problems here")
     def test_loadTestsFromName__relative_malformed_name(self):
         loader = unittest.TestLoader()
 
@@ -811,6 +812,7 @@ class Test_TestLoader(unittest2.TestCase):
     # TestCase or TestSuite instance."
     #
     # What happens when presented with an impossible module name?
+    @unittest.skipIf(sys.version_info[:2] >= (3, 5), "python 3.5 has problems here")
     def test_loadTestsFromNames__malformed_name(self):
         loader = unittest2.TestLoader()
 
@@ -918,6 +920,7 @@ class Test_TestLoader(unittest2.TestCase):
     # "The method optionally resolves name relative to the given module"
     #
     # What happens when presented with an impossible attribute name?
+    @unittest.skipIf(sys.version_info[:2] >= (3, 5), "python 3.5 has problems here")
     def test_loadTestsFromNames__relative_malformed_name(self):
         loader = unittest.TestLoader()
 
diff</a></td><td class='form'><form class='right' method='get' action='/guix/log/gnu/services/sysctl.scm'>
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<option value='grep'>log msg</option>
<option value='author'>author</option>
<option value='committer'>committer</option>
<option value='range'>range</option>
</select>
<input class='txt' type='search' size='10' name='q' value=''/>
<input type='submit' value='search'/>
</form>
</td></tr></table>
<div class='path'>path: <a href='/guix/log/?id=069ddd9900f50b930684dbb746dc19487d322612'>root</a>/<a href='/guix/log/gnu?id=069ddd9900f50b930684dbb746dc19487d322612'>gnu</a>/<a href='/guix/log/gnu/services?id=069ddd9900f50b930684dbb746dc19487d322612'>services</a>/<a href='/guix/log/gnu/services/sysctl.scm?id=069ddd9900f50b930684dbb746dc19487d322612'>sysctl.scm</a></div><div class='content'><table class='list nowrap'><tr class='nohover'><th class='left'>Age</th><th class='left'>Commit message (<a href='/guix/log/gnu/services/sysctl.scm?id=069ddd9900f50b930684dbb746dc19487d322612&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2019-11-20 21:23:19 +0200'>2019-11-20</span></td><td><a href='/guix/commit/gnu/services/sysctl.scm?id=77ed06a8bf049827c45e6208475ac9527eb423ea'>services: sysctl: Make service one-shot.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/services/sysctl.scm (sysctl-shepherd-service): Adjust shepherd
service to use the 'one-shot?' keyword. Remove 'stop' command. Remove
'respawn' option.
</span></span></td><td>Efraim Flashner</td></tr>
<tr><td><span title='2017-07-18 20:16:03 +0800'>2017-07-18</span></td><td><a href='/guix/commit/gnu/services/sysctl.scm?id=172b3e2cc2d0384970c362e46af8231c63b0b004'>services: sysctl: Fix typo.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/services/sysctl.scm: Fix typo of 'make-sysctl-configuration'.
</span></span></td><td>宋文武</td></tr>
<tr><td><span title='2017-07-04 20:40:51 +0800'>2017-07-04</span></td><td><a href='/guix/commit/gnu/services/sysctl.scm?id=296bf4d5ab1cf7822956205b6d266c2c67ce056c'>services: Add 'sysctl-service-type'.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/services/sysctl.scm: New file.
* doc/guix.texi (Miscellaneous Services): Document it.
* gnu/local.mk (GNU_SYSTEM_MODULES): Add it.
</span></span></td><td>宋文武</td></tr>