taking the global reqs that we can

Change-Id: Icfdeeab14e90728aa8167ad6587d51e9b10cb846

requirements.txt

@@ -1,7 +1,7 @@
 dnspython>=1.9.4
 eventlet>=0.9.15
 greenlet>=0.3.1
-netifaces>=0.5
+netifaces>=0.5,!=0.10.0,!=0.10.1
 pastedeploy>=1.3.3
 simplejson>=2.0.9
 xattr>=0.4

setup.py

@@ -17,6 +17,14 @@
 # THIS FILE IS MANAGED BY THE GLOBAL REQUIREMENTS REPO - DO NOT EDIT
 import setuptools
 
+# In python < 2.7.4, a lazy loading of package `pbr` will break
+# setuptools if some other modules registered functions in `atexit`.
+# solution from: http://bugs.python.org/issue15881#msg170215
+try:
+    import multiprocessing  # noqa
+except ImportError:
+    pass
+
 setuptools.setup(
     setup_requires=['pbr'],
     pbr=True)