Added testfixtures as test dependency and removed coverage from pep8 …

…environments as dependency

tox.ini

@@ -10,6 +10,7 @@ envlist = py27, py32, py33, py34, hi27, hi32, hi33, hi34, pep8-py34, pep8-py27
 deps = 
     coverage == 3.7.1
     pytest >= 2.5.0
+    testfixtures == 4.0.1
 commands = python {envbindir}/coverage run --source rediscluster -p -m py.test
 
 [testenv:hi27]
@@ -18,38 +19,41 @@ deps =
     coverage == 3.7.1
     hiredis >= 0.1.3
     pytest >= 2.5.0
+    testfixtures == 4.0.1
 
 [testenv:hi32]
 basepython = python3.2
 deps =
     coverage == 3.7.1
     hiredis >= 0.1.3
     pytest >= 2.5.0
+    testfixtures == 4.0.1
 
 [testenv:hi33]
 basepython = python3.3
 deps =
     coverage == 3.7.1
     hiredis >= 0.1.3
     pytest >= 2.5.0
+    testfixtures == 4.0.1
 
 [testenv:hi34]
 basepython = python3.4
 deps =
     coverage == 3.7.1
     hiredis >= 0.1.3
     pytest >= 2.5.0
+    testfixtures == 4.0.1
 
 [testenv:pep8-py34]
 basepython= python3.4
 deps = 
-    coverage == 3.7.1
     pep8 == 1.5.7
 commands = pep8 --repeat --show-source --exclude=.venv,.tox,dist,docs,build,*.egg,.git --ignore=E501 .
 
 [testenv:pep8-py27]
 basepython= python2.7
 deps = 
-    coverage == 3.7.1
     pep8 == 1.5.7
+    testfixtures == 4.0.1
 commands = pep8 --repeat --show-source --exclude=.venv,.tox,dist,docs,build,*.egg,.git --ignore=E501 .