Fix: PE: Bug cl#5140 - Allow set members to be stopped when the subseqent set has require-all=false
Refactor: PE: Remove dead code
Fix: PE: Bug cl#5143 - Prevent shuffling of anonymous master/slave instances
Test: PE: Bug cl#5143 - Prevent shuffling of anonymous master/slave instances
Refactor: Use more specific error codes than -EREMOTEIO