setup/test: add python-unshare and passfd dependency in test dependency

This reverts commit f9b112a7

python-unshare and python-passfd are dependencies of nemu: https://github.com/NightTsarina/nemu/blob/master/setup.py#L18,
but nemu in pypi: https://pypi.org/project/nemu/0.3.1/ is outdated, it has no dependency defined
so keep those here

setup.py

@@ -95,7 +95,7 @@ setup(
     extras_require = {
         'geoip': ['geoip2'],
         'multicast': ['PyYAML'],
-        'test': ['mock', 'pathlib2', 'nemu', 'multiping']
+        'test': ['mock', 'pathlib2', 'nemu', 'python-unshare', 'python-passfd', 'multiping']
     },
     #dependency_links = [
     #    "http://miniupnp.free.fr/files/download.php?file=miniupnpc-1.7.20120714.tar.gz#egg=miniupnpc-1.7",