[RFE] Automatically detect users were deleted in LDAP and provide a mechanism to remove anything they "owned" in ManageIQ and determine if the user should be deleted on our side

[jrafanie]

If my user owned a vm and a template in ManageIQ and then my user is deleted in LDAP, ManageIQ doesn't detect this deletion so we have resources that are owned and a user who cannot login.

We should detect ldap users that are no longer valid and hook into ManageIQ/manageiq-ui-classic#8986 to provide a way to transition any owned resources to another owner, such as their group. We also should decide if the user should be deleted at that point or if it makes sense to keep it around for a time period.

[ifwatts]

I would leave the user id in the system to ensure you can have clear "audit trail" but being able to manage it / transition to new user sounds reasonable.