Depend on hacking for its dependencies.

flake8 does not pin its pep8 and pyflakes dependencies which makes it
possible for new sets of rules to suddenly apply whenever either of
those projects pushes a new release. Fix this by depending on hacking
instead of flake8, pep8, and pyflakes directly. This will keep nodepool
in sync with the rest of openstack even if it doesn't use the hacking
rules (H*).

Change-Id: Ice9198e9439ebcac15e76832835e78f72344425c

nodepool/nodedb.py

@@ -255,7 +255,7 @@ class NodeDatabaseSession(object):
             snapshot_image_table.c.provider_name == provider_name,
             snapshot_image_table.c.image_name == image_name,
             snapshot_image_table.c.state == READY).order_by(
-            snapshot_image_table.c.version.desc()).all()
+                snapshot_image_table.c.version.desc()).all()
         return images
 
     def getCurrentSnapshotImage(self, provider_name, image_name):

test-requirements.txt

@@ -1,4 +1,5 @@
-flake8==2.0
+# Nodepool uses hacking for its dependencies
+hacking>=0.8,<0.9
 coverage
 sphinx>=1.1.2,<1.2
 docutils==0.9.1