adding machine_name and failure_classification_id to job endpoint
fixed tests, added ``job_coalesced_to_guid``
Merge branch 'master' into filterable-job-fields
fixed issue from lightsofappolo wrt option_collection in the view
more fixes for option_collections
Merge pull request #114 from mozilla/filterable-job-fields

adding machine_name and failure_classification_id to job endpoint