HPCC-10936 - Include support for priority & comment

Give user ability to publish a priority of SLA,HIGH,LOW and an option for
comment.

Signed-off by: Miguel Vazquez <miguel.vazquez@lexisnexis.com>
Merge pull request #5510 from miguelvazq/HPCC-10936

HPCC-10936 - Include support for priority & comment

Reviewed-By: Gordon Smith <gordon.smith@lexisnexis.com>
Reviewed-By: Richard Chapman <rchapman@hpccsystems.com>