Create integration test to verify property pages’ functionality

[piotroko]

We need to create an integration test verifying different property pages.

[johnbeisner]

We should not implement this test in Tao, but it should be written in the new test harness. Using Tao would require adding 'property pages' functionality to Apex + new Tao actions and then eventually porting to the new test harness.

[MattGertz]

Mondo escrow triage: test-only, moving to 15.4 to get this off the radar.