HPCC-8036 Java/Python language support in ECL

Signed-off-by: Richard Taylor <richard.taylor@lexisnexis.com>
Merge pull request #4076 from RichardTaylorHPCC/B8036

HPCC-8036 Java/Python language support in ECL

Reviewed-By: Richard Chapman <rchapman@hpccsystems.com>