)

* [WIP] Live query validation, where supported

This builds on apache#7422 to build check-as-you-type sql
query validation in Sql Lab. This closes apache#6707 too.

It adds a (debounced) call to the validate_sql_json
API endpoint with the querytext, and on Lyft infra is
able to return feedback to the user (end to end) in
$TBD seconds.

At present feedback is provided only through the
"annotations" mechanism build in to ACE, although
I'd be open to adding full text elsewhere on the
page if there's interest.

* fix: Unbreak lints and tests

…#7517)

This change makes the query progress bar only show
whole number percentage changes, instead of numbers
like 12.13168276%.

* Validate start/end when scheduling queries

* Use chrono instead of Sugar

* Show scheduled queries

* Remove column

* Secure views

* Add import

* Fix unit tests

* Reuse existing db connection from view

* Remove unnecessary import