Try again with JSON in string

Change-Id: Ib4ca52e5ef2104a68724b417be184cf0266a763b
diff --git a/xos/synchronizer/steps/sync_host.yaml b/xos/synchronizer/steps/sync_host.yaml
index 4bfd789..a98fc02 100644
--- a/xos/synchronizer/steps/sync_host.yaml
+++ b/xos/synchronizer/steps/sync_host.yaml
@@ -9,5 +9,5 @@
       method: POST
       user: onos
       password: rocks
-      body: "{{ '{{' }} lookup('file', '{{ files_dir }}/{{ rest_config.fn }}') {{ '}}' }}"
+      body: "{{ rest_body }}"
       body_format: json
\ No newline at end of file