Validate - Log depot & DB Backup fixes
Validate - Log depot & DB Backup fixes

log_depot_edit (log depot) - call validate_settings, not rails validate (on FileDepot*)

file_depot_smb needs MiqSmbSchedule - require mount/miq_generic_mount_session
(transferred from ManageIQ/manageiq@a2394a41ff0c68a4ff3ded49170a7f486eca3a77)

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