HUE-1820 [jb] Finishing jobs are red and stuck

Added 'STARTED' and 'FINISHING' as possible statuses
HUE-1847 [metastore] Dropping loads of dbs or tables makes the script to timeout

Optimized code
HUE-1753 [beeswax] Setting and files inputs in the editor are not user friendly

Improved a bit adding a tooltip on the field
Ajax stat on files doesn't try to download certain mimetypes anymore
Fixed layout problem of the file field on Chrome
HUE-1574 [beeswax] ASCII error on query page
HUE-1817 [beeswax] Migrate several tests to the new API

Move UTF decode to Queries page only
[jobsub] Limit number of designs
HUE-1845 [impala] Automatic query closing

made query history state expired when closing queries
[oozie] Fix Coordinator SLA edition

Workflow editor expects a list of dicts of observables.
Coordinator used to only have an observable array of dicts.

If we want to re-use the same utils/forms we need a more complex SLA object for Coordinator.
[oozie] Shared coordinators can not be run by non ower users

The original coordinator workspace can be non existent.
Merge remote-tracking branch 'upstream/master' into testing-abe