Set Field value to a blank value to avoid crashes due to nil value
Set Field value to a blank value to avoid crashes due to nil value

https://bugzilla.redhat.com/show_bug.cgi?id=1466778

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