Temporary reduce size of test matrix to get at MySQL 5.1

.travis.yml

@@ -27,84 +27,12 @@ rvm:
   - ruby-head
 matrix:
   include:
-    - rvm: 1.8.7
-      dist: precise
-      env: SPEC_OPTS="--order rand:11"
-      addons:
-        hosts:
-          - mysql2gem.example.com
-        apt:
-          packages:
-          - mysql-server-5.5
-          - mysql-client-core-5.5
-          - mysql-client-5.5
-    - rvm: ree
-      dist: precise
-      env: SPEC_OPTS="--order rand:11"
-      addons:
-        hosts:
-          - mysql2gem.example.com
-        apt:
-          packages:
-          - mysql-server-5.5
-          - mysql-client-core-5.5
-          - mysql-client-5.5
-    - rvm: 2.4
-      env: DB=mariadb10.0
-      addons:
-        mariadb: 10.0
-        hosts:
-          - mysql2gem.example.com
-    - rvm: 2.4
-      env: DB=mariadb10.1
-      addons:
-        mariadb: 10.1
-        hosts:
-          - mysql2gem.example.com
-    - rvm: 2.4
-      env: DB=mariadb10.2
-      addons:
-        mariadb: 10.2
-        hosts:
-          - mysql2gem.example.com
     - rvm: 2.0.0
       env: DB=mysql51
       dist: precise
       addons:
         hosts:
           - mysql2gem.example.com
-    - rvm: 2.0.0
-      env: DB=mysql55
-      dist: precise
-      addons:
-        hosts:
-          - mysql2gem.example.com
-        apt:
-          packages:
-          - mysql-server-5.5
-          - mysql-client-core-5.5
-          - mysql-client-5.5
-    - rvm: 2.4
-      env: DB=mysql57
-      addons:
-        hosts:
-          - mysql2gem.example.com
-    - rvm: 2.4
-      env: DB=mysql80
-      addons:
-        hosts:
-          - mysql2gem.example.com
-    - os: osx
-      rvm: system
-      env: DB=mysql56
-      addons:
-        hosts:
-          - mysql2gem.example.com
-      before_install:
-        # Use the system RubyGem with the system Ruby
-        - gem --version
-        - sudo gem install bundler
-        - bash .travis_setup.sh
   fast_finish: true
   allow_failures:
     - rvm: ruby-head