travis: use groonga setup script

.travis.yml

@@ -8,15 +8,12 @@ env:
   - MYSQL_VERSION=5.5.27
   - MARIADB_VERSION=5.5.25
 install:
-  - echo "deb http://packages.groonga.org/ubuntu/ $(lsb_release --short --codename) universe" | sudo tee /etc/apt/sources.list.d/groonga.list
+  - curl https://raw.github.com/groonga/groonga/master/data/travis/setup.sh | sh
   - echo "deb-src http://packages.groonga.org/ubuntu/ $(lsb_release --short --codename) universe" | sudo tee --append /etc/apt/sources.list.d/groonga.list
   - echo "deb http://downloads.sourceforge.net/project/cutter/ubuntu/ $(lsb_release --short --codename) main" | sudo tee /etc/apt/sources.list.d/cutter.list
   - sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys 1C837F31
   - sudo apt-get update
-  - sudo apt-get -y --allow-unauthenticated install groonga-keyring
-  - sudo apt-get -y purge zeromq
-  - sudo apt-get update
-  - sudo apt-get -y install libgroonga-dev cutter-testing-framework
+  - sudo apt-get -y install cutter-testing-framework
 before_script:
   - tools/travis_before_script.sh
 script: