Removed - jruby-head from travis

There is an issue on travis where running on - jruby-head sometimes crashes 
 git clone --depth=50 --branch=master git://github.com/hammernight/taza.git hammernight/taza
Cloning into 'hammernight/taza'...
remote: Counting objects: 564, done.
remote: Compressing objects: 100% (306/306), done.
remote: Total 564 (delta 296), reused 455 (delta 224)
Receiving objects: 100% (564/564), 81.09 KiB | 0 bytes/s, done.
Resolving deltas: 100% (296/296), done.
Checking connectivity... done.
$ cd hammernight/taza
git.3
$ git checkout -qf 1ff54bae3b73a9db9fa83ec17f3a9aba48a82e1c
rvm.1
Setting up latest jruby-head
$ rvm get stable
Downloading https://get.rvm.io
Downloading https://github.com/wayneeseguin/rvm/archive/stable.tar.gz
Upgrading the RVM installation in /home/travis/.rvm/
    RVM PATH line found in /home/travis/.profile /home/travis/.bashrc /home/travis/.zshrc.
    RVM sourcing line found in /home/travis/.bashrc.
    RVM sourcing line not found for Zsh, rerun this command with '--auto-dotfiles' flag to fix it.
Upgrade of RVM in /home/travis/.rvm/ is complete.
# travis,
#
#   Thank you for using RVM!
#   We sincerely hope that RVM helps to make your life easier and more enjoyable!!!
#
# ~Wayne, Michal & team.
In case of problems: http://rvm.io/help and https://twitter.com/rvm_io
Upgrade Notes:
  * WARNING: your RVM loading script `/etc/profile.d/rvm.sh` is deprecated
    and causes you to have `umask g+w` set in your shell,
    run `rvm get head --auto-dotfiles` again to fix your scripts.
  * No new notes to display.
RVM reloaded!
$ export ruby_alias=`rvm alias show jruby-head 2>/dev/null`
$ rvm alias delete jruby-head
Deleting alias: jruby-head...
$ rvm remove ${ruby_alias:-jruby-head} --gems
jruby-head - #already gone
$ rvm remove jruby-head --gems --fuzzy
jruby-head - #already gone
$ rvm install jruby-head --binary
Searching for binary rubies, this might take some time.
Found remote file https://s3.amazonaws.com/travis-rubies/binary/jruby-head.tar.gz
Checking requirements for ubuntu.
Requirements installation successful.
jruby-head - #configure
jruby-head - #download
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
100 34.7M  100 34.7M    0     0  29.0M      0  0:00:01  0:00:01 --:--:-- 29.1M
No checksum for downloaded archive, recording checksum in user configuration.
jruby-head - #validate archive
jruby-head - #extract
jruby-head - #validate binary
jruby-head - #setup
jruby-head - #making binaries executable.....
jruby-head - #downloading rubygems-2.2.2
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
100  404k  100  404k    0     0  19.4M      0 --:--:-- --:--:-- --:--:-- 24.6M
jruby-head - #extracting rubygems-2.2.2...
jruby-head - #removing old rubygems.........
jruby-head - #installing rubygems-2.2.2......................
jruby-head - #gemset created /home/travis/.rvm/gems/jruby-head@global
jruby-head - #importing gemset /home/travis/.rvm/gemsets/jruby/global.gems........................................................
jruby-head - #generating global wrappers.........
jruby-head - #gemset created /home/travis/.rvm/gems/jruby-head
jruby-head - #importing gemset /home/travis/.rvm/gemsets/default.gems....................
jruby-head - #generating default wrappers.........
$ rvm use jruby-head
Using /home/travis/.rvm/gems/jruby-head
$ export BUNDLE_GEMFILE=$PWD/Gemfile
$ ruby --version
jruby 9000.dev (2.1.0.dev) 2014-02-04 f854344 on Java HotSpot(TM) 64-Bit Server VM 1.7.0_51-b13 [linux-amd64]
$ rvm --version
rvm 1.25.22 (stable) by Wayne E. Seguin <wayneeseguin@gmail.com>, Michal Papis <mpapis@gmail.com> [https://rvm.io/]
$ gem --version
2.2.2
$ bundle --version
Bundler version 1.5.3
Applying fix for NPM certificates
install
$ bundle install
Fetching gem metadata from http://rubygems.org/...........
Fetching additional metadata from http://rubygems.org/..
Resolving dependencies...
Installing rake (0.9.6)
Installing Selenium (1.1.14)
Installing i18n (0.6.9)
Installing minitest (4.7.5)
Installing multi_json (1.9.2)
Installing atomic (1.1.16)
Installing thread_safe (0.3.1)
Installing tzinfo (0.3.39)
Installing activesupport (4.0.4)
Installing builder (3.2.2)
Installing ffi (1.9.3)
Installing childprocess (0.5.1)
Installing commonwatir (4.0.0)
Installing diff-lcs (1.2.5)
Installing firewatir (1.9.4)
Installing hoe (3.10.0)
Installing mocha (0.9.12)
Installing rspec-core (2.14.8)
Installing rspec-expectations (2.14.5)
Installing rspec-mocks (2.14.6)
Installing rspec (2.14.1)
Installing rubyzip (1.1.2)
Installing s4t-utils (1.0.4)
Installing websocket (1.0.7)
Installing selenium-webdriver (2.40.0)
Installing thor (0.19.1)
Installing xml-simple (1.1.3)
Installing user-choices (1.1.6.1)
Installing watir-webdriver (0.6.8)
Using taza (0.9.2.0) from source at .
Using bundler (1.5.3)
Your bundle is complete!
Use `bundle show [gemname]` to see where a bundled gem is installed.
$ bundle exec rspec spec
file:/home/travis/.rvm/rubies/jruby-head/lib/jruby.jar!/jruby/kernel/kernel.rb:25 warning: unsupported exec option: close_others
No output has been received in the last 10 minutes, this potentially indicates a stalled build or something wrong with the build itself.
The build has been terminated