CORD-1250 Update to new Service/Tenancy models

Change-Id: I37e73892af3d33163d60cc0095d9bf8368ec3e22
diff --git a/xos/onos.xproto b/xos/onos.xproto
index 24345ea..2481a5a 100644
--- a/xos/onos.xproto
+++ b/xos/onos.xproto
@@ -2,13 +2,11 @@
 option name="onos";
 option verbose_name="ONOS Service";
 
-message ONOSApp (Tenant){
+message ONOSApp (ServiceInstance){
      optional string install_dependencies = 1 [db_index = False, null = True, blank = True];
      optional string dependencies = 2 [db_index = False, null = True, blank = True];
-     optional manytoone creator->User:onos_apps = 3 [db_index = True, null = True, blank = True];
 }
 
-
 message ONOSService (Service){
      optional string rest_hostname = 1 [db_index = False, max_length = 255, null = True, content_type = "stripped", blank = True];
      required int32 rest_port = 2 [default = 8181, null = False, db_index = False, blank = False];