HPCC-9266 DFU server logging excessive when spraying multiple files

Only display partition information for small number of partitions.

Signed-off-by: Attila Vamos <attila.vamos@gmail.com>

Cleaned up whitespace and commit comment

Signed-off-by: Richard Chapman <rchapman@hpccsystems.com>
Merge branch 'HPCC-9266-improvement2'

Signed-off-by: Richard Chapman <rchapman@hpccsystems.com>