HPCC-9307 initial work and refactoring of action lists

Signed-off-by: Gavin Halliday <gavin.halliday@lexisnexis.com>
HPCC-9307 Clean up the code

Signed-off-by: Gavin Halliday <gavin.halliday@lexisnexis.com>
HPCC-9307 Allow roxie to have dependencies within a subgraph

Signed-off-by: Gavin Halliday <gavin.halliday@lexisnexis.com>
Merge pull request #5017 from ghalliday/issue9307

HPCC-9307 initial work and refactoring of action lists

Reviewed-By: Richard Chapman <rchapman@hpccsystems.com>