Add safeguard for VMs without ext_management_system https://bugzilla.redhat.com/show_bug.cgi?id=1684649
Add safeguard for VMs without ext_management_system
https://bugzilla.redhat.com/show_bug.cgi?id=1684649

ManageIQ/manageiq-ui-classic,ManageIQ/manageiq-ui-classic,ManageIQ/manageiq-ui-classic,ManageIQ/manageiq-ui-classic