Migrate behavior of Department/Organization rules

[cthielen]

• Determine any GroupRule Organization rules that are really referencing departments with no children and convert those rules to "Department is ..."
• Ensure remaining organizations map to top level BOUs from IAM feed
• Ensure IAM task is importing bou top-level organizations
• ‘Department is ...’ rules become rules referencing people’s PPS associations
• 'Add Business Office Unit is ...' rules to match BOUs and their departments

[cthielen]

Created task 'group:convert_org_rules'. Need to run in production.

Added to MIGRATION_PLAN. Be sure to follow when deploying.