Enable unit testing

Adds the necessary scaffolding to run unit tests in this project.

Actual tests will be added in later commits.

Change-Id: Ia348dda6b482ca269dceace09f6ac3b24bbd6b32

test-requirements.txt

@@ -1 +1,4 @@
 hacking>=0.8.0,<0.9
+
+oslotest
+testrepository>=0.0.18

tox.ini

@@ -1,12 +1,14 @@
 [tox]
 minversion = 1.6
 skipsdist = True
-envlist = pep8
+envlist = py26,py27,pep8
 
 [testenv]
 usedevelop = True
 deps = -r{toxinidir}/requirements.txt
        -r{toxinidir}/test-requirements.txt
+commands=
+    python setup.py testr --slowest --testr-args='{posargs}'
 
 [testenv:venv]
 commands = {posargs}
@@ -18,3 +20,6 @@ commands = flake8
 ignore = E125,H803
 exclude = .venv,.tox,dist,doc,*.egg
 show-source = true
+
+[tox:jenkins]
+downloadcache = ~/cache/pip