Performance improvements for cron job

[Aaron Wells]

For a client, I recently implemented some performance improvements to the Mahara cron job. I've opened this bug to upstream them.

The specific improvements are:

1. Make it so that the cron doesn't run auth_setup()

2. Make it so that the cron doesn't run while the site is in the middle of an upgrade (this can cause a pile-up of cron tasks waiting for a DB lock to be released)

3. Removing the obsolete "forcelocalupgrade" option.

[Mahara Bot (dev-mahara)]

Patch for "master" branch: https://reviews.mahara.org/4350

[Mahara Bot (dev-mahara)]

Reviewed: https://reviews.mahara.org/4350
Committed: http://gitorious.org/mahara/mahara/commit/b4c1755f02d1be190e4c2b8ab8f83293d0c84b7f
Submitter: Robert Lyon (<email address hidden>)
Branch: master

commit b4c1755f02d1be190e4c2b8ab8f83293d0c84b7f
Author: Aaron Wells <email address hidden>
Date: Mon Jan 26 17:38:09 2015 +1300

Bug 1427901: Performance improvements for cron

- Cron doesn't need to run auth_setup()
- Don't run cron when site is closed for upgrade
- Get rid of forcelocalupgrade() option because it's no longer needed

Change-Id: I1718b13337c50fadc0573d04f5b3d6b20bc842c2

[Mahara Bot (dev-mahara)]

Patch for "15.04_STABLE" branch: https://reviews.mahara.org/4530

[Mahara Bot (dev-mahara)]

Reviewed: https://reviews.mahara.org/4530
Committed: http://gitorious.org/mahara/mahara/commit/0adc97975216929b3bb4a7d681798bf6e76a6ce1
Submitter: Robert Lyon (<email address hidden>)
Branch: 15.04_STABLE

commit 0adc97975216929b3bb4a7d681798bf6e76a6ce1
Author: Aaron Wells <email address hidden>
Date: Mon Jan 26 17:38:09 2015 +1300

Bug 1427901: Performance improvements for cron

- Cron doesn't need to run auth_setup()
- Don't run cron when site is closed for upgrade
- Get rid of forcelocalupgrade() option because it's no longer needed

Change-Id: I1718b13337c50fadc0573d04f5b3d6b20bc842c2