software/jstestnode: setup a default _ value

Allow the software release to be correctly instanciated even if not
instance parameter has been configured.

software/jstestnode/buildout.hash.cfg

@@ -15,7 +15,7 @@
 
 [instance]
 filename = instance.cfg.in
-md5sum = 1d6bb3263f642a115982ddf245cb1cf0
+md5sum = e6203cba0084289edec2176b185d3427
 
 [template-nginx-service]
 filename = template-nginx-service.sh.in

software/jstestnode/instance.cfg.in

@@ -95,3 +95,4 @@ partition = $${slap_connection:partition_id}
 url = $${slap_connection:server_url}
 key = $${slap_connection:key_file}
 cert = $${slap_connection:cert_file}
+configuration._ = {}
\ No newline at end of file