added primaryKey to sys_users schema

schema/ant-object/default_db.sys_users/sys_users/sys_users.xsd

@@ -55,6 +55,7 @@
                    system_cache__appinfo:restriction_path_TODEL=""
                    name="sys_users"
                    id="default_d___d5e6178-1_sys_users"
+                   system_cache__appinfo:primaryKey="UserId"
                    system_cache__appinfo:sort="0"
                    system_cache__appinfo:root_element_in_schema="true"
                    system_cache__appinfo:prefix="default_db"