Add DVLA_EMAIL_ADDRESS to manifest so it gets picked up from

credentials.

manifest.yml.j2

@@ -150,6 +150,8 @@ applications:
       TEMPLATE_PREVIEW_API_HOST: '{{ TEMPLATE_PREVIEW_API_HOST }}'
       TEMPLATE_PREVIEW_API_KEY: '{{ TEMPLATE_PREVIEW_API_KEY }}'
 
+      DVLA_EMAIL_ADDRESS: '{{ DVLA_EMAIL_ADDRESS }}'
+
       {% for key, value in app.get('additional_env_vars', {}).items() %}
       {{key}}: '{{value}}'
       {% endfor %}