distro/rhel84: add packages to be match imagefactory

The packages in the last imagefactory nightly differ from ours. The
following packages are now added:

oddjob
oddjob-mkhomedir
psmisc
authselect-compat
rng-tools
dbxtool

Also, the rngd and nfs-convert services are enabled.

internal/distro/rhel84/distro.go

@@ -891,11 +891,13 @@ func New() distro.Distro {
 		mimeType: "application/x-qemu-disk",
 		packages: []string{
 			"@core",
+			"authselect-compat",
 			"chrony",
 			"cloud-init",
 			"cloud-utils-growpart",
 			"cockpit-system",
 			"cockpit-ws",
+			"dbxtool",
 			"dhcp-client",
 			"dnf",
 			"dnf-plugin-spacewalk",
@@ -906,6 +908,9 @@ func New() distro.Distro {
 			"kernel",
 			"NetworkManager",
 			"nfs-utils",
+			"oddjob",
+			"oddjob-mkhomedir",
+			"psmisc",
 			"python3-jsonschema",
 			"qemu-guest-agent",
 			"redhat-release",
@@ -951,7 +956,9 @@ func New() distro.Distro {
 			"libertas-sd8787-firmware",
 			"libertas-usb8388-firmware",
 			"plymouth",
-			"rng-tools",
+		},
+		enabledServices: []string{
+			"rngd.service",
 		},
 		defaultTarget:           "multi-user.target",
 		kernelOptions:           "console=tty0 console=ttyS0,115200n8 no_timer_check net.ifnames=0 crashkernel=auto",