Closes-Bug: #1416354

Provisioning External router is not happening through server-manager
Issue: External bgp param was not used in new infra.

Fix:
Add the param.

Change-Id: I6599d2de92f02584934fe5a8f94a804f277384b1

src/server_mgr_puppet.py

@@ -1934,7 +1934,10 @@ def build_contrail_hiera_file(
                 provision_params.get('kernel_upgrade', DEFAULT_KERNEL_UPGRADE))
             data += 'contrail::params::kernel_version: "%s"\n' %(
                 provision_params.get('kernel_version', DEFAULT_KERNEL_VERSION))
-
+        if 'external_bgp' in provision_params and \
+            provision_params['external_bgp'] :
+            data += 'contrail::params::external_bgp: "%s"\n' %(
+                provision_params.get('external_bgp', ""))
         if "uuid" in cluster_params:
             data += 'contrail::params::uuid: "%s"\n' %(
                 cluster_params.get('uuid', ""))