Let's try to wait 20 minutes on the install, 10 minutes is not reliable enough anymore with out migrations

Signed-off-by: Joas Schilling <coding@schilljs.com>

.travis.yml

@@ -35,7 +35,7 @@ branches:
 
 before_install:
   - wget https://raw.githubusercontent.com/nextcloud/travis_ci/master/before_install.sh
-  - . ./before_install.sh $APP_NAME $CORE_BRANCH $DB
+  - travis_wait 20 . ./before_install.sh $APP_NAME $CORE_BRANCH $DB
   - sh -c "if [ -f ../server/data/nextcloud.log ]; then cat ../server/data/nextcloud.log; fi"
 
   # Add some output debugging information