HPCC-9518 Issues with reporting on suspended queries

Signed-off-by: Richard Chapman <rchapman@hpccsystems.com>
HPCC-9411 Information needed about unloadable roxie queries

Queries that cannot be loaded for some reason will now be created as dummy
query entries, so that they will still appear in the output from
control:queries.

Signed-off-by: Richard Chapman <rchapman@hpccsystems.com>