smapiv2: add Query.diagnostics
smapiv2: add Query.diagnostics

djs55/message-switch,xapi-project/message-switch,djs55/message-switch-1,djs55/message-switch-1,djs55/message-switch,xapi-project/message-switch,djs55/message-switch-1,djs55/message-switch,xapi-project/message-switch