HPCC-9975 Evaluate(module) does not like enum

Added switch case to hqlutil.cpp to ignore exported enumerated type deffinitions
when declared within a module listed as an output parameter.

Signed-off-by: jamienoss <james.noss@lexisnexis.com>
Merge pull request #4856 from jamienoss/issue9975-evalModENUM

HPCC-9975 Evaluate(module) does not like enum

Reviewed-by: Gavin Halliday <ghalliday@hpccsystems.com>