Merge pull request #114 from cisagov/improvement/switch-to-ubuntu-to-…

…build-an-arm64-ami

Correct default user name in `shell` provisioner

src/packer.pkr.hcl

@@ -217,7 +217,7 @@ build {
     # We need to call bash here because after hardening /tmp has the
     # noexec bit set on it.
     execute_command = "chmod +x {{ .Path }}; sudo env {{ .Vars }} bash {{ .Path }} ; rm -f {{ .Path }}"
-    inline          = ["sed -i '/^users:/ {N; s/users:.*/users: []/g}' /etc/cloud/cloud.cfg", "rm --force /etc/sudoers.d/90-cloud-init-users", "rm --force /root/.ssh/authorized_keys", "/usr/sbin/userdel --remove --force admin"]
+    inline          = ["sed -i '/^users:/ {N; s/users:.*/users: []/g}' /etc/cloud/cloud.cfg", "rm --force /etc/sudoers.d/90-cloud-init-users", "rm --force /root/.ssh/authorized_keys", "/usr/sbin/userdel --remove --force ubuntu"]
     skip_clean      = true
   }
 }