[Table] CdkTable doesn't automatically connect to data source when using OnPush

[willshowell]

Bug, feature request, or proposal:

Bug

Current behavior

dataSource.connect() is not subscribed to until the second ngDoCheck hook, which must be triggered manually when using OnPush in the parent component.

Expected behavior

Data source is connected as soon as possible, not requiring an extra check

Workaround

constructor(private cd: ChangeDetectorRef) { }

ngOnInit() {
  this.dataSource = new ExampleDataSource(this.exampleDatabase);
  setTimeout(() => this.cd.markForCheck());
}

What are the steps to reproduce?

Reproduction: https://plnkr.co/edit/ACvDB3mUsNIIyOC16vpu?p=preview
Workaround: https://plnkr.co/edit/4p0pnAvmfYjIwWMXSqud?p=preview

[andrewseguin]

Thanks Will, we've got a PR open that will resolve this - #5775. This was similar to the issue we were having with router changes not rendering the table.

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