PID reusage is not checked for different set methods

[giampaolo]

Summary

• Type: core

Description

Doc states:

process identity is preemptively checked (via PID + creation time) is for the following methods: nice() (set), ionice() (set), cpu_affinity() (set), rlimit() (set), children(), parent(), parents(), suspend() resume(), send_signal(), terminate() kill().

It turns out we're currently doing this only for "kill" methods (suspend() resume(), send_signal(), terminate() kill()) and children().
We're not doing it for set methods:

• nice() (set)
• ionice() (set)
• cpu_affinity() (set)
• rlimit() (set)
• parent()

Also, since we do it for parent(), we should also do it for parents() and ppid().