Dont run pylint on python2.6 (pylint no longer supports)

tox.ini

@@ -1,5 +1,5 @@
 [tox]
-envlist = py{26,27,py,33,34,35}, docs
+envlist = py{26,27,33,34,35,py}, docs
 
 [pytest]
 testpaths = kafka test
@@ -11,7 +11,7 @@ deps =
     pytest
     pytest-cov
     pytest-catchlog
-    pytest-pylint
+    py{27,33,34,35,py}: pytest-pylint
     pytest-sugar
     pytest-mock
     mock
@@ -24,6 +24,10 @@ setenv =
     PROJECT_ROOT = {toxinidir}
 passenv = KAFKA_VERSION
 
+[testenv:py26]
+# pylint doesn't support python2.6
+commands = py.test {posargs:--cov=kafka}
+
 [testenv:docs]
 deps =
     sphinxcontrib-napoleon