add nemu dependcy

due to outdated pypi version, nemu don't include need moudle in
setup.py, I add them in buildout

software/slapos-testing/software.cfg

@@ -148,6 +148,8 @@ eggs +=
   zope.testing
   supervisor
   pathlib2
+  python-unshare
+  python-passfd
 
 [eggs/scripts]
 recipe = zc.recipe.egg
@@ -268,7 +270,7 @@ urllib3 = 1.24.1
 pathlib = 1.0.1
 psycopg2 = 2.8.6
 miniupnpc = 1.9
-python-passfd = 0.2
-python-unshare = 0.2
 nemu = 0.3.1
 multiping = 1.1.2
+python-passfd = 0.2
+python-unshare = 0.2