HPCC-11398 Spray file using NodeGroup and change related display

Read and display node group as spray target to thor cluster;
Rename related variables/methods from 'cluster' to 'NodeGroup';
Rename the variable 'DFUQRFcluster' to 'DFUQRFnodegroup' and rename
the variable 'DFUQRFgroup' to 'DFUQRFnodegroups';
Rename the 'Cluster' column to 'NodeGroup' on Browse Logical File
page.

Signed-off-by: Kevin Wang kevin.wang@lexisnexis.com
HPCC-11228 Revise based on review

Signed-off-by: Kevin Wang kevin.wang@lexisnexis.com
HPCC-11398 Change getNodeGroupFromLFN() to match code convention

Signed-off-by: Kevin Wang kevin.wang@lexisnexis.com
HPCC-11398 One more change based on comment

Signed-off-by: Kevin Wang kevin.wang@lexisnexis.com
Merge pull request #5879 from wangkx/h11228

HPCC-11398 Spray file using NodeGroup and change related display

Reviewed-By: Jake Smith <jake.smith@lexisnexis.com>
Reviewed-By: Richard Chapman <rchapman@hpccsystems.com>