added vars_files

installations/dc2/components/opdk-setup-postgres-common.yml

diff --git a/installations/dc2/components/opdk-setup-postgres-common.yml b/installations/dc2/components/opdk-setup-postgres-common.yml
index 2c6e586..7015614 100644
--- a/installations/dc2/components/opdk-setup-postgres-common.yml
+++ b/installations/dc2/components/opdk-setup-postgres-common.yml
@@ -1,8 +1,11 @@
 ---
 - hosts: '{{ hosts }}'
   strategy: free
+  vars_files:
+  - ~/.apigee/credentials.yml
   roles:
   - apigee-opdk-enable-swap
+  - apigee-opdk-setup-default-settings
   - apigee-opdk-setup-apigee-user
   - apigee-opdk-setup-os-postgres
   - apigee-opdk-setup-postgres-config