remove logstash/test.rb and abandon bin/logstash test, rub all specs by default for bin/logstash rspec
quick fix of forgotten specs
also run deep specs with make test
refactor jar loading
use refactored jar loading for embedded elasticsearch loading
changed assess_jruby! to use block param, added specs & doc
removed assess_jruby! & renamed spec/environment.rb
removed assess_jruby! & renamed spec/environment.rb
Merge pull request #1233 from colinsurprenant/jar_loading

jar loading refactor