HOST name is not fully qualified

EBS R12.1.3 running on RHEL7 two node config with db and app on separate servers.

I'm doing some new server setup work and going through my rapid clone steps.

After running my 'perl adcfgclone.pl dbTechStack' step I notice the listener.ora file looks good with a FQN for the server but my tnsnames.ora file just uses short name for the server and I'm not sure why that is?

For example:

->grep HOST listener.ora tnsnames.ora

listener.ora:      (ADDRESS = (PROTOCOL = TCP)(HOST = shortname.xxxxx.yyyyy.com)(PORT = 15xx))

tnsnames.ora:                (ADDRESS=(PROTOCOL=tcp)(HOST=shortname)(PORT=15xx))

tnsnames.ora:                (ADDRESS=(PROTOCOL=tcp)(HOST=shortname)(PORT=15xx))