Adjust Gainsight configuration

- replace Gainsight with sf-reporter image
- add Salesforce credentials
- remove unused params
- remove csv mount

Related-PROD: PROD-34801
(cherry-picked from I46358acee9c3167795a4d2393041fd3875cd2e94)

Change-Id: I1972a8a88ced719ba53462e60d34d89f3368faa1
diff --git a/defaults/stacklight.yml b/defaults/stacklight.yml
index 625d20c..9ed6a8f 100644
--- a/defaults/stacklight.yml
+++ b/defaults/stacklight.yml
@@ -8,3 +8,10 @@
     # ELK stack versions
     elasticsearch_version: 5
     kibana_version: 5
+    # Salesforce
+    sf_notifier_sfdc_auth_url: "default"
+    sf_notifier_sfdc_username: "default"
+    sf_notifier_sfdc_password: "default"
+    sf_notifier_sfdc_organization_id: "default"
+    sf_notifier_sfdc_environment_id: "default"
+    sf_notifier_sfdc_sandbox_enabled: "True"