arm64 images: add journal-to-console

This element puts the systemd journal to the console, so you can see
it with "openstack console log".  Useful in situations where
networking is getting stuck; sometimes glean/networking is logging
useful things that aren't seen.

Change-Id: I4e3d95ca942f4e5bd629d236afe378353de092b9

nodepool/nb03.openstack.org.yaml

@@ -71,6 +71,7 @@ diskimages:
       - initialize-urandom
       - growroot
       - infra-package-needs
+      - journal-to-console
     release: xenial
     env-vars:
       TMPDIR: /opt/dib_tmp
@@ -95,6 +96,7 @@ diskimages:
       - cache-devstack
       - growroot
       - infra-package-needs
+      - journal-to-console
     release: bionic
     env-vars:
       TMPDIR: /opt/dib_tmp
@@ -120,6 +122,7 @@ diskimages:
       - cache-devstack
       - growroot
       - infra-package-needs
+      - journal-to-console
     release: buster
     env-vars:
       TMPDIR: /opt/dib_tmp
@@ -142,6 +145,7 @@ diskimages:
       - cache-devstack
       - growroot
       - infra-package-needs
+      - journal-to-console
     release: stretch
     env-vars:
       TMPDIR: /opt/dib_tmp