[BUG] type field in the link should be mandatory, if it's set to mandatory config_load fails for `lo` link.

[Ali-aqrabawi]

load_linux_running_config: Storing loaded data to sysrepo running datastore.
libyang[0]: Mandatory node "type" instance does not exist. (path: Data location "/iproute2-ip-link:links/link[name='lo']".)