mock released 1.1.0, which no longer works with py26

tox.ini

@@ -26,6 +26,34 @@ commands =
 # always recreate the venv
 recreate = True
 
+# mock >= 1.1.0 no longer works with py26
+# the only difference between this and 'testenv' is the mock requirement version
+[testenv:py26]
+deps =
+  cov-core
+  coverage==3.7.1
+  execnet
+  pep8
+  py
+  pytest
+  pytest-cache
+  pytest-cov
+  pytest-pep8
+  pytest-flakes
+  # mock >= 1.1.0 no longer works with py26
+  mock==1.0.1
+  freezegun
+  boto==2.32.0
+  pytest-blockage
+
+sitepackages = False
+commands = 
+    pip freeze
+    py.test -vv --pep8 --flakes --blockage {posargs} awslimitchecker
+
+# always recreate the venv
+recreate = True
+
 [testenv:docs]
 # this really just makes sure README.rst will parse on pypi
 passenv = CI TRAVIS* CONTINUOUS_INTEGRATION