HPCC-8576 Document Thor Memory settings

Signed-off-by: Jim DeFabia <jamesdefabia@lexisnexis.com>
HPCC-8576 Edits based upon feedback

Signed-off-by: Jim DeFabia <jamesdefabia@lexisnexis.com>
HPCC-8576 Edits from Feedback

Signed-off-by: Jim DeFabia <jamesdefabia@lexisnexis.com>
Merge pull request #6601 from JamesDeFabia/8576DocsThorMemory

HPCC-8576 Document Thor Memory settings

Reviewed-By: Jake Smith <jake.smith@lexisnexis.com>
Reviewed-By: Richard Chapman <rchapman@hpccsystems.com>