Bug 1574941: Adding bulk delete validation
To avoid:
1) Bulk deleting all users - by checking if you
are deleting yourself.
2) Bulk deleting all the site admins - which can happen if you are an
institutional admin and the site admin(s) are in the same institution
behatnotneeded
Change-Id: I4c33d9e54f14e688897275066d2ee128557d4465
Signed-off-by:
Robert Lyon <robertl@catalyst.net.nz>