switch default aws region to us-central-1 (Frankfurt)

Change-Id: Ia089bb7f85170810eadd66d2e7ddd04d9c945f98
diff --git a/jenkins/client/job/deploy/lab/deploy.yml b/jenkins/client/job/deploy/lab/deploy.yml
index d7f56e9..5520bc1 100644
--- a/jenkins/client/job/deploy/lab/deploy.yml
+++ b/jenkins/client/job/deploy/lab/deploy.yml
@@ -97,7 +97,7 @@
               # aws api
               AWS_STACK_REGION:
                 type: string
-                default: "us-west-2"
+                default: "eu-central-1"
               AWS_API_CREDENTIALS:
                 type: string
                 default: "aws-credentials"