FIX: update Lagosta testbed REST API client to match the changed Krill add child REST API JSON body request format.

Author: ximon18

src/services/APIService.js

@@ -181,11 +181,7 @@ export default {
         v4: typeof ipv4_res !== "undefined" ? ipv4_res.trim() : "",
         v6: typeof ipv6_res !== "undefined" ? ipv6_res.trim() : ""
       },
-      child_request: {
-        tag: null,
-        child_handle: child.trim(),
-        id_cert: id_cert.trim()
-      }
+      id_cert: id_cert.trim()
     }).catch(handleError);
   },
   testbedGetParentResponseXML(child) {