CloudBees Replication Parent 2173

High Availability (HA) only supports aggregations APIs (namely /job/xxx/api/json, /computer/api/json and queue/api/json) with only the /api/json variant and mandatory ?tree parameter, as discussed in the HA considerations documentation. However, the APIs would have returned non-aggregated output if the ?tree was missing or non json variants such as /api/xml or /api/python were invoked. Now, these unintended requests return HTTP 400 bad request with appropriate messages.