Make EditEntityTest run hook code

This very simple fake makes sure EditEntity::runEditFilterHooks
is run and runtime errors like the ugly one in
I2e7296b0cc44a5fee73f2ba8eeef0fe291ebcb0c are found early.

Change-Id: I1e577a54a5ed5f458cc69fdcd60c9699a367cb62
Merge "Make EditEntityTest run hook code"