#13: update gems and ruby
#13: added tests for RHEL
#13: rollback some changes
#13: updated tests, removed unnecessary code
#13: added specs for MDV package
#13: removed empty lines
#13: added comments
#13: updated application.yml.sample
#13: updated DEPRECATED methods
#13: fixed uninitialized constant NewRelic
#13: removed hiredis gem
#13: added thread_safe: true to Redis
#13: rollback changes
#13: rollback redis gem
#13: removed hiredis gem
#13: removed init of NewRelic
#13: removed unnecessary code
#13: updated version of ruby
Merge pull request #14 from abf/abf-worker:13-update-gems
 #13: Updated gems, ruby version, some refactoring