Scheduler space is incorrectly excluded from the Activity Stream

The reason it's been excluded is because the scheduler modifies the pages containing the job objects whenever a job is fired.

However excluding the whole scheduler space is wrong for several reasons:

• job pages could be located in other spaces and they won't be excluded (see XASCH-56)
• the scheduler home page or any other pages that are not job pages in the scheduler space should be visible in the activity stream
• in addition a change to a job should also be visible in the activity stream. It's only when the scheduler makes a trigger modification that we may want to not display it in the activity stream