Users are autoadded to the deleted groups

[Yuliya Bozhko]

To reproduce:

# create a group with "Auto-add users" setting on.
# delete a group
# create a user after the group has been deleted
# if you check group_members table, you will see that the new user was added to the deleted group

[Mahara Bot (dev-mahara)]

Patch for "master" branch: https://reviews.mahara.org/8300

[Mahara Bot (dev-mahara)]

Patch for "master" branch: https://reviews.mahara.org/8301

[Mahara Bot (dev-mahara)]

Reviewed: https://reviews.mahara.org/8300
Committed: https://git.mahara.org/mahara/mahara/commit/58ed18d690a675c48e467930c359b57d7c28fa00
Submitter: Robert Lyon (<email address hidden>)
Branch: master

commit 58ed18d690a675c48e467930c359b57d7c28fa00
Author: Yuliya Bozhko <email address hidden>
Date: Thu Nov 23 10:54:56 2017 +1300

Bug 1733963: Do not auto-add users to the deleted groups

behatnotneeded

Change-Id: Ic35bbc464ab2c9fa812d66e8e7adc5b71a6da7ba
Signed-off-by: Yuliya Bozhko <email address hidden>

[Mahara Bot (dev-mahara)]

Reviewed: https://reviews.mahara.org/8301
Committed: https://git.mahara.org/mahara/mahara/commit/55d17eec38c9674f3287abdfeaefd81fc1f47d80
Submitter: Cecilia Vela Gurovic (<email address hidden>)
Branch: master

commit 55d17eec38c9674f3287abdfeaefd81fc1f47d80
Author: Robert Lyon <email address hidden>
Date: Thu Nov 23 13:11:10 2017 +1300

Bug 1733963: Remove users from groups if added after group deleted

This can happen if a group had auto add new members on yet the group
was deleted when the user was added to the site

behatnotneeded

Change-Id: I72de52032f41c21d961d437c48a6e87d4f299188
Signed-off-by: Robert Lyon <email address hidden>