Merge pull request #128 from owncloud/fix-travis-branch-stable8

Fix the travis target branch and the branches.only setting

Author: DeepDiver1975

.travis.yml

@@ -7,7 +7,7 @@ php:
 
 env:
   global:
-    - CORE_BRANCH=master
+    - CORE_BRANCH=stable8
     - APP_NAME=bookmarks
 
   matrix:
@@ -16,7 +16,7 @@ env:
 branches:
   only:
     - master
-    - stable7
+    - /^stable\d*$/
 
 before_install:
 #  - composer install