Take le-auto tests out of Travis until we figure out why sudo:required causes other ones to fail.

For now, we'll run them locally with `tox -e le_auto` as we do with the apacheconf tests.

.travis.yml

@@ -1,7 +1,6 @@
 language: python
 
 services:
-  - docker
   - rabbitmq
   - mariadb
   # apacheconftest
@@ -23,7 +22,6 @@ env:
   matrix:
     - TOXENV=py26 BOULDER_INTEGRATION=1
     - TOXENV=py27 BOULDER_INTEGRATION=1
-    - TOXENV=le_auto
     - TOXENV=lint
     - TOXENV=cover
 # Disabled for now due to requiring sudo -> causing more boulder integration
@@ -39,7 +37,8 @@ branches:
     - master
     - /^test-.*$/
 
-sudo: required
+# container-based infrastructure
+sudo: false
 
 addons:
   # make sure simplehttp simple verification works (custom /etc/hosts)