disable py27-dj111-sqlite-xdist-coverage on travis

Author: luzfcb

.travis.yml

@@ -16,8 +16,8 @@ jobs:
       env: TOXENV=py36-dj111-mysql_innodb-coverage
       services:
         - mysql
-    - python: 2.7
-      env: TOXENV=py27-dj111-sqlite-xdist-coverage
+#    - python: 2.7
+#      env: TOXENV=py27-dj111-sqlite-xdist-coverage
     - python: 3.6
       env: TOXENV=checkqa,docs