Travis CI fails with rbx

[dmytro]

https://travis-ci.org/dmytro/nagira/jobs/3769887

$ rvm use rbx-19mode
Using /home/travis/.rvm/gems/rbx-head-d19
$ ruby --version
rubinius 2.0.0rc1 (1.9.3 release 2012-11-02 JI) [i686-pc-linux-gnu]
$ gem --version
1.8.24
....
$ bundle exec rspec spec
....F.F.F.F........................................................................................

[dmytro]

Tests are OK with rvm and rbx --1.9, disabling Travis for rubinius for now. Need to investgate later.