HUE-1894 [beeswax] Some errors are not reseted at query execution

Reset error widgets at execution time.
HUE-1723 [beeswax] Example SQL text should not be executable
[i18n] Removing mo file
HUE-1887 [oozie] Support dashboard Coordinator and Workflow action SLA

Pass #1
SLA main page:
- add one more day in the end date
- sort list by nominal time
- combine id and parent_id
- make date filtering easier to disable
- make SLA properties parameterizable

All:
Support Coordinator SLA, Workflow action SLA
[beeswax] Fix execute query button for temporary queries
[oozie] Credentials can be combined comma separatedly in one action

Tested with hive and hiveserver2.
We should update the properties before deploying.
[beeswax] Only close queries that are not running
HUE-1857 [oozie] Allow import workflows with subworkflow identified at runtime

Fix subworkflow ID handling so that we can see what subworkflow is selected.
Make subworkflow optional in the editor as well.
[core] Set en locale not fuzzy
[i18n] Removing mo files from the repository
HUE-1902 [oozie] Update coordinator dataset action is broken

ko.clean was removing the data attribute.
HUE-1857 [oozie] Allow import workflows with subworkflow identified at runtime

Save workflow without workflow in subworkflow action.
[core] fix result monitoring
HUE-1905 [core] Add security handling for yarn and mr2

Reuse security_enabled in yarn config section for both yarn and MR2 security.
Add kerberos handler for all log calls and yarn/mr2 api clients.
If a particular service is not kerberized, it should still work
since SPNEGO seems to work with insecure clusters.
HUE-218 [beeswax] Add mechanism to kill a Hive query

Works with Yarn.
Also fix query cancelling that was using the wrong id
[core] Ignore all the mo files except the ones from third parties in ext-py
HUE-1658 [oozie] Cron like scheduling

Replace old double dropdown by an text crontab.
Try to go convert old frequency format to the new crontab one.
Adding a new coordinator util lib as it needs to work on both edit and create
coordinator tab.

Dashboard should detect if the coordinator is using the crontab format and
try display it in english with the plugin (todo in another jira)
Choice was made to remove the previous form. Frequencies like every 3 days
is a bit more complicated are not supported by the plugin and some like
every 2 days are not supported by cron AFAIK.

Maybe add the advanced options to use the old dropdown.
Merge remote-tracking branch 'remotes/origin/testing' into testing