sched: Preserve the nice level over sched_setscheduler() and sched_se…
…tparam() calls
sched: Fix up scheduler syscall LTP fails
sched: Fix up attr::sched_priority warning
sched: Move SCHED_RESET_ON_FORK into attr::sched_flags
fix the fix: kernel/sched/core.c

Signed-off-by: Jean Francis Dominique S. Mabalot <jfdsmabalot@redhat.com>