Community Edition 4.2.2-rc8 Release Candidate 8

Signed-off-by: Richard Chapman <rchapman@hpccsystems.com>
Merge pull request #5296 from jakesmith/hpcc-10686

HPCC-10686 - Need to check subfile after lock retry

Reviewed-By: Richard Chapman <rchapman@hpccsystems.com>
HPCC-10664 - Hold locks to subfiles, release super

Ensure that any activity that lookups a file, holds the locks to
the subfiles and releases the lock to the super. This allows
other jobs/components to manipulate the super, once the job has
established which files it needs.

Signed-off-by: Jake Smith <jake.smith@lexisnexis.com>