5s instead of 15s

Removes moment dependency.
Adds response parser tests (based on frontend tests).
Adds time series query tests (based on frontend tests).
Fixes various issues related to response parsing and building search request queries.
Added support for extended stats metrics and geo hash grid aggregations.

Handles minor differences of es 2, 5 and 5.6.
Implements index pattern logic.
Exposes builders for building search requests.

Move time series query logic to specific file.
Remove model parser and move to time series query file, adds parser test.

add query timeout option for Prometheus

update provisioning.md

stylize & name datasources properly

This reverts commit a101177b.

Ref #12009

This reverts commit 92e5968f.

Ref #12009

This reverts commit 3ba59a1d66a2a3c07ccd04a48c403f0772fbef31.

Improve alert docs

explore: fixes #11953

build: script for tagging and pushing a release

Adds constant description for units

* refactor: tracing service refactoring

* refactor: sqlstore to instance service

* refactor: sqlstore & registory priority

* refactor: sqlstore refactor wip

* sqlstore: progress on getting tests to work again

* sqlstore: progress on refactoring and getting tests working

* sqlstore: connection string fix

* fix: not sure why this test is not working and required changing expires

* fix: updated grafana-cli

Makes `km/h` constant with distances

legend: fixes Firefox/baron scroll bug

create annotation on non-editable dashboard

scroll: temporary fix for double scrollbar issue

Compensates for Firefox scrollbar calculation error in the baron framework.
Offsetwidth and clientwidth are used to find the width of the scrollbar. In
the legend these differ by 9px and cause the scroll div to grow by 9px for
every refresh. This fix compensates with a negative margin-right in that
case.

Fixes #11830

If #11939 is not merged in the patch release, then
this is a temporary fix for 5.1.3. It sets overflow to
hidden for larger screens and keeps the overflow set to
auto for mobiles and tablets.

Fixes #11937

backend plugins: expose meta field