add hostname to network alias

We use the name as alias but using the hostname makes also sense and
this is what docker does. We have to keep the short id as well for
docker compat.

While adding some tests I removed some duplicated tests that were
executed twice for nv for no reason.

Fixes #17370

Signed-off-by: Paul Holzinger <pholzing@redhat.com>

test/system/500-networking.bats

@@ -471,8 +471,10 @@ load helpers.network
     run_podman run -d --network $netname $IMAGE top
     background_cid=$output
 
+    local hostname=host-$(random_string 10)
     # Run a httpd container on first network with exposed port
     run_podman run -d -p "$HOST_PORT:80" \
+            --hostname $hostname \
             --network $netname \
             -v $INDEX1:/var/www/index.txt:Z \
             -w /var/www \
@@ -490,7 +492,7 @@ load helpers.network
 
     # check network alias for container short id
     run_podman inspect $cid --format "{{(index .NetworkSettings.Networks \"$netname\").Aliases}}"
-    is "$output" "[${cid:0:12}]" "short container id in network aliases"
+    is "$output" "[${cid:0:12} $hostname]" "short container id and hostname in network aliases"
 
     # check /etc/hosts for our entry
     run_podman exec $cid cat /etc/hosts
@@ -550,7 +552,7 @@ load helpers.network
 
     # check network2 alias for container short id
     run_podman inspect $cid --format "{{(index .NetworkSettings.Networks \"$netname2\").Aliases}}"
-    is "$output" "[${cid:0:12}]" "short container id in network aliases"
+    is "$output" "[${cid:0:12} $hostname]" "short container id and hostname in network2 aliases"
 
     # curl should work
     run curl --max-time 3 -s $SERVER/index.txt