fix setup and add tox with pep8

.gitignore

@@ -1,4 +1,5 @@
 .idea
 *.egg-info
 dist
-*.pyc
+*.pyc
+.tox

setup.py

@@ -17,7 +17,7 @@ requirements = [
     'nose==1.3.0',
     'oslo.config==1.1.1',
     'paramiko==1.10.1',
-    'pbr==0.5.17',
+    'pbr>=0.5.21,<1.0',
     'pika==0.9.13',
     'prettytable==0.7.2',
     'pyOpenSSL==0.13',
@@ -37,7 +37,7 @@ requirements = [
     'testresources==0.2.7',
     'warlock==1.0.1',
     'wsgiref==0.1.2',
-    'yaml==3.10'
+    'pyyaml==3.10'
 ]
 
 

tox.ini

@@ -0,0 +1,11 @@
+# Tox (http://tox.testrun.org/) is a tool for running tests
+# in multiple virtualenvs. This configuration file will run the
+# test suite on all supported python versions. To use it, "pip install tox"
+# and then run "tox" from this directory.
+
+[tox]
+envlist = pep8
+
+[testenv:pep8]
+deps = pep8
+commands = pep8 --repeat --show-source --exclude=.venv,.tox,dist,doc,*egg .