Run the test excluding scrivito tag, if build from forked repo

Author: nalabjp

.travis.yml

@@ -18,7 +18,9 @@ cache:
   - bundler
 script:
   - bundle exec rake db:migrate --trace
-  - bundle exec rake
+  - if [ "$TRAVIS_PULL_REQUEST" = "false" ]; then bundle exec rspec spec; fi
+  - if [ "$TRAVIS_PULL_REQUEST" != "false" ] && [ "$TRAVIS_PULL_REQUEST_SLUG" = "coderdojo-japan/coderdojo.jp" ]; then bundle exec rspec spec; fi
+  - if [ "$TRAVIS_PULL_REQUEST" != "false" ] && [ "$TRAVIS_PULL_REQUEST_SLUG" != "coderdojo-japan/coderdojo.jp" ]; then bundle exec rspec spec --tag ~@scrivito; fi
 env:
   global:
     - TZ='Asia/Tokyo'