host_controller_spec - test validate on new host doesn't crash
host_controller_spec - test validate on new host doesn't crash

Previously, it would throw an Error, leading to a 500, this tests there
is no *http* error validating a new host.
(transferred from ManageIQ/manageiq@0b0c665efcb46cd45280d4fba25525c81fe64d1c)

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