DEVOPS-2168 Set up this cookie name for overriding

Since the cookie's domain is *.edx.org use different names to help with
testing in stage/prod/edge.

playbooks/roles/edxapp/defaults/main.yml

@@ -244,6 +244,7 @@ EDXAPP_CMS_AUTH_EXTRA: "{{ EDXAPP_AUTH_EXTRA }}"
 EDXAPP_ENABLE_MKTG_SITE: false
 EDXAPP_MKTG_URL_LINK_MAP: {}
 EDXAPP_MKTG_URLS: {}
+EDXAPP_EDXMKTG_USER_INFO_COOKIE_NAME: "edx-user-info"
 # Set this sets the url for static files
 # Override this var to use a CDN
 # Example: xxxxx.cloudfront.net/static/
@@ -783,6 +784,7 @@ generic_env_config:  &edxapp_generic_env
   SUBDOMAIN_BRANDING: "{{ EDXAPP_SUBDOMAIN_BRANDING }}"
   REGISTRATION_EXTRA_FIELDS: "{{ EDXAPP_REGISTRATION_EXTRA_FIELDS }}"
   XBLOCK_SETTINGS: "{{ EDXAPP_XBLOCK_SETTINGS }}"
+  EDXMKTG_USER_INFO_COOKIE_NAME: "{{ EDXAPP_EDXMKTG_USER_INFO_COOKIE_NAME }}"
 
 lms_auth_config:
   <<: *edxapp_generic_auth