FIX using pylint for python2.

.buildbot/test/01-requirements.sh

@@ -3,4 +3,8 @@ if test "$python_major_version" = "2" ; then
 	pip install 'django<2'
 fi
 pip install -r requirements.txt
-pip install pylint-django
+if test "$python_major_version" = "2" ; then
+	pip install 'pylint-django<2'
+else
+	pip install pylint-django
+fi