REST server errors are not always reported correctly due to missing exception handling

[davidnich]

ex:

2021-07-17 00:08:12.061326 qorus-core:130 T23 [INFO]: "qorus-1" (ipv6[::]:8011): cid 164: RECV BODY: "300000
"
2021-07-17 00:08:12.095223 qorus-core:130 T23 [ERROR]: System exception: /opt/share/qore-modules/1.0.1/RestHandler.qm:784 (Qore): PROGRAM-ERROR: the Program accessed has already been deleted and therefore cannot be accessed
  AbstractRestClass::dispatchStream() called at /opt/share/qore-modules/1.0.1/RestHandler.qm:755 (Qore user code)
  AbstractRestClass::handleRequest() called at /opt/share/qore-modules/1.0.1/RestHandler.qm:749 (Qore user code)
  AbstractRestClass::handleRequest() called at /opt/share/qore-modules/1.0.1/RestHandler.qm:749 (Qore user code)
  AbstractRestClass::handleRequest() called at /opt/share/qore-modules/1.0.1/RestHandler.qm:1306 (Qore user code)
  RestHandler::handleRequest() called at QorusRestApiHandler.qc:16282 (Qore user code)
  WebAppHandler::handleRequest() called at /opt/share/qore-modules/1.0.1/HttpServer.qm:1611 (Qore user code)
  HttpServer::handleRequest() called at /opt/share/qore-modules/1.0.1/HttpServer.qm:2517 (Qore user code)
  HttpListener::connectionThread() called at /opt/share/qore-modules/1.0.1/HttpServer.qm:2345 (Qore user code)
  HttpListener::<anonymous closure>() called at <builtin>:-1 (Qore user code)

This error is thrown when trying to register the error in a stream handler