It was detected on StarlingX the lack of correct hostname after
address atribution by the server, if the installation is IPv6. This
change makes the dhclient script read the field fqdn_hostname (if
available) to set the name.
Test Plan
[PASS] Install AIO-DX within a IPv6 network
[PASS] unlock controller-1
Story: 2009968
Task: 46211
Signed-off-by: Andre Fernando Zanella Kantek <AndreFernandoZanella.Kantek@windriver.com>
Change-Id: I9c876d00feed03720317fa4d581971b4c25f771f