Merge pull request #3911 from edx/ENT-435

ENT-435: Enable third_party_auth flag by default

playbooks/roles/edxapp/defaults/main.yml

@@ -173,7 +173,7 @@ EDXAPP_CAS_ATTRIBUTE_PACKAGE: ""
 # Used for performance testing
 EDXAPP_ENABLE_AUTO_AUTH: false
 # Settings for enabling and configuring third party authorization
-EDXAPP_ENABLE_THIRD_PARTY_AUTH: false
+EDXAPP_ENABLE_THIRD_PARTY_AUTH: true
 EDXAPP_ENABLE_OAUTH2_PROVIDER: false
 
 EDXAPP_ENABLE_MOBILE_REST_API: false
@@ -490,11 +490,11 @@ EDXAPP_REGISTRATION_EXTRA_FIELDS:
   level_of_education: "optional"
   gender: "optional"
   year_of_birth: "optional"
-  mailing_address: "optional"
+  mailing_address: "hidden"
   goals: "optional"
   honor_code: "required"
   city: "hidden"
-  country: "hidden"
+  country: "required"
 
 EDXAPP_CELERY_WORKERS:
   - queue: low