MetricsPanelCtrl: use shared queryRunner to support query execution (#16659)

* move queryRunner to panelModel

* remove isEditing from PanelChrome

* move listener to QueriesTab

* use queryRunner on MetricsPanelCtrl

* Added interval back as prop, not used yet

* QueryRunner: worked on tests

* PanelQueryRunner: Refactoring, added getQueryRunner to PanelModel

* PanelQueryRunner: interpolatel min interval

* merge master and remove grafana-live

public/app/plugins/datasource/grafana-live/_plugin.json

@@ -1,7 +0,0 @@
-{
-  "type": "datasource",
-  "name": "Grafana Live",
-  "id": "grafana-live",
-
-  "metrics": true
-}

public/app/plugins/datasource/grafana-live/datasource.ts

@@ -1,34 +0,0 @@
-import { liveSrv } from 'app/core/core';
-
-class DataObservable {
-  target: any;
-
-  constructor(target) {
-    this.target = target;
-  }
-
-  subscribe(options) {
-    const observable = liveSrv.subscribe(this.target.stream);
-    return observable.subscribe(data => {
-      console.log('grafana stream ds data!', data);
-    });
-  }
-}
-
-export class GrafanaStreamDS {
-  subscription: any;
-
-  /** @ngInject */
-  constructor() {}
-
-  query(options): any {
-    if (options.targets.length === 0) {
-      return Promise.resolve({ data: [] });
-    }
-
-    const target = options.targets[0];
-    const observable = new DataObservable(target);
-
-    return Promise.resolve(observable);
-  }
-}

public/app/plugins/datasource/grafana-live/module.ts

@@ -1,8 +0,0 @@
-import { GrafanaStreamDS } from './datasource';
-import { QueryCtrl } from 'app/plugins/sdk';
-
-class GrafanaQueryCtrl extends QueryCtrl {
-  static templateUrl = 'partials/query.editor.html';
-}
-
-export { GrafanaStreamDS as Datasource, GrafanaQueryCtrl as QueryCtrl };

public/app/plugins/datasource/grafana-live/partials/query.editor.html

@@ -1,8 +0,0 @@
-<query-editor-row query-ctrl="ctrl" can-collapse="false">
-	<div class="gf-form-inline">
-		<div class="gf-form gf-form--grow">
-			<label class="gf-form-label width-8">Stream</label>
-			<input type="text" class="gf-form-input" ng-model="ctrl.target.stream" spellcheck='false' placeholder="metric">
-		</div>
-	</div>
-</query-editor-row>