Back out some version bumps

I'm giving up on trying to back out all of the test-requirements
up-revs, but let's try to stay compatibile with old requests/six.

As part of that, only disable some requests warnings on new-enough requests.

Note that we should now be compatible with distro packages back to
Ubuntu 16.04 and CentOS 6. Our six is still too new for Trusty, but
hey, there's less than a year left on that anyway, right?

Change-Id: Iccb23638393616f9ec3da660dd5e39ea4ea94220
Related-Change: I2a8f465c8b08370517cbec857933b08fca94ca38

1 files changed, 4 insertions, 10 deletions

diff --git a/setup.py b/setup.py
index 518f1d3..16a18f6 100644
--- a/setup.py
+++ b/setup.py
@@ -17,16 +17,10 @@
 # THIS FILE IS MANAGED BY THE GLOBAL REQUIREMENTS REPO - DO NOT EDIT
 import setuptools, sys
 
-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
+if sys.version_info < (2, 7):
+    sys.exit('Sorry, Python < 2.7 is not supported for'
+             ' python-swiftclient>=3.0')
 
 setuptools.setup(
-    setup_requires=['pbr>=2.0.0'],
+    setup_requires=['pbr'],
     pbr=True)