[travis-ci] uninstall default bundler first ... to make sure newer version is not picked
[travis-ci] uninstall default bundler first ... to make sure newer version is not picked
ctreatma/warbler,ctreatma/warbler,fedenusy/warbler,ctreatma/warbler,fedenusy/warbler,idibon/warbler,idibon/warbler,fedenusy/warbler,idibon/warbler,ctreatma/warbler,fedenusy/warbler,idibon/warbler