message: Do not clean telemetryInitializers
diff: @@ -524,7 +524,7 @@ export class ApplicationInsights extends BaseTelemetryPlugin implements IAppInsi
  this._pageViewManager = new PageViewManager(this, this.config.overridePageViewDuration, this.core, this._pageViewPerformanceManager);
  this._pageVisitTimeManager = new PageVisitTimeManager(this.diagLog(), (pageName, pageUrl, pageVisitTime) => this.trackPageVisitTime(pageName, pageUrl, pageVisitTime))
  - this._telemetryInitializers = [];
  + this._telemetryInitializers = this._telemetryInitializers || [];
  this._addDefaultTelemetryInitializers(configGetters);
  