Update location of staging database

Author: Aaron Suarez

kubernetes/operationcode_python_backend/overlays/staging/deployment.yaml

@@ -10,7 +10,7 @@ spec:
           image: operationcode/back-end:staging
           env:
             - name: DB_HOST
-              value: python-staging.czwauqf3tjaz.us-east-2.rds.amazonaws.com
+              value: postgres.pgo.svc.cluster.local
             - name: ENVIRONMENT
               value: aws_staging
             - name: EXTRA_HOSTS

kubernetes/resources_api/overlays/staging/database-service.yaml

@@ -4,4 +4,4 @@ metadata:
   name: resources-postgres
 spec:
   type: ExternalName
-  externalName: python-staging.czwauqf3tjaz.us-east-2.rds.amazonaws.com
+  externalName: staging-postgres.pgo.svc.cluster.local