rvm:
  - 1.9.3
  - 2.0.0
  - 2.1.*
  - 2.2.*
gemfile:
  - Gemfile
  - Gemfile.fluentd.lt.0.12

rvm:
  - 1.9.3
  - 2.0.0
  - 2.1.*
  - 2.2.*
gemfile:
  - Gemfile
  - Gemfile.fluentd.lt.0.12
before_install:
  - gem update bundler

Fix bundler error in Travis CI
Fix bundler error in Travis CI
