Debug messages are now logged when setting some task's parameter
fails because the task vanished. Previously errors were logged.
Log messages (for kernel threads and zombie processes) or warnings
(otherwise) are now logged when setting a task's affinity fails because
its affinity is fixed. Previously either errors or nothing was logged,
depending on the specific case.
Resolves: rhbz#1474961
Signed-off-by: Ondřej Lysoněk <olysonek@redhat.com>