See below for all the commit messages squashed into this one...
add a test
delete empty space
add job_cancellation worker
change id
change job_id param
add job restart worker
add require to sidekiq.rb
change params
add test for job restart and cancellation
add test for job restart
update build.rb improve build spec
update job restart with correct response, add test to chack for correct response when restarting job
