message: add check for IModelApp.hasRenderSystem to fix continuous integration tests
diff: import { expect, assert } from "chai";
  import {
  + IModelApp,
  IModelConnection,
  // Viewport,
  SpatialViewState,
  @@ -64,6 +65,10 @@ describe("GeometryAccumulator tests", () => {
  });
  beforeEach(() => {
  + if (!IModelApp.hasRenderSystem) {
  + return;
  + }
  +
  accum = new GeometryAccumulator(iModel, System.instance);
  });
  @@ -179,6 +184,8 @@ describe("GeometryAccumulator tests", () => {
  // ###TODO
  // it("saveToGraphicList works as expected", () => {
  -
  + // const viewport = new Viewport(canvas, spatialView);
  + // const gfParams = GraphicBuilderCreateParams.create(GraphicType.Scene, viewport);
  + // const primBuilder = new PrimitiveBuilder(System.instance, gfParams);
  // });
  });
  