look for cloudformation templates in cfn directory

Change-Id: I234f17960bf0bd19b078fd2e5eccbe31f08628c2
diff --git a/cloud-deploy-pipeline.groovy b/cloud-deploy-pipeline.groovy
index 44a536a..e05fae3 100644
--- a/cloud-deploy-pipeline.groovy
+++ b/cloud-deploy-pipeline.groovy
@@ -156,7 +156,8 @@
 
                         // start stack
                         def stack_params = ["ParameterKey=KeyName,ParameterValue=" + AWS_SSH_KEY]
-                        aws.createStack(venv_path, env_vars, STACK_TEMPLATE, STACK_NAME, stack_params)
+                        def template_file = 'cfg/' + STACK_TEMPLATE + '.yml'
+                        aws.createStack(venv_path, env_vars, template_file, STACK_NAME, stack_params)
                     }
 
                     // wait for stack to be ready