gms/gossiper: Enable more token_metadata::is_member() checks
gms/gossiper: Enable more token_metadata::is_member() checks

Translate more is_member() checks like in commit 67f4b55 ("gms/gossiper:
Fix is_gossip_only_member() logic").

This hopefully cures #36.

Signed-off-by: Pekka Enberg <add4fcd06328a394f0ad91feda7ee057316dc5ed@cloudius-systems.com>

scylladb/scylla,raphaelsc/scylla,tempbottle/scylla,linearregression/scylla,bowlofstew/scylla,wildinto/scylla,senseb/scylla,rluta/scylla,respu/scylla,phonkee/scylla,phonkee/scylla,eklitzke/scylla,guiquanz/scylla,tempbottle/scylla,wildinto/scylla,kjniemi/scylla,kangkot/scylla,bowlofstew/scylla,asias/scylla,duarten/scylla,gwicke/scylla,senseb/scylla,kangkot/scylla,duarten/scylla,respu/scylla,victorbriz/scylla,justintung/scylla,tempbottle/scylla,gwicke/scylla,capturePointer/scylla,guiquanz/scylla,victorbriz/scylla,respu/scylla,raphaelsc/scylla,raphaelsc/scylla,scylladb/scylla,victorbriz/scylla,capturePointer/scylla,dwdm/scylla,glommer/scylla,avikivity/scylla,shaunstanislaus/scylla,senseb/scylla,rentongzhang/scylla,aruanruan/scylla,dwdm/scylla,kjniemi/scylla,stamhe/scylla,rentongzhang/scylla,duarten/scylla,bowlofstew/scylla,justintung/scylla,linearregression/scylla,rentongzhang/scylla,eklitzke/scylla,glommer/scylla,rluta/scylla,avikivity/scylla,acbellini/scylla,scylladb/scylla,shaunstanislaus/scylla,justintung/scylla,glommer/scylla,dwdm/scylla,stamhe/scylla,rluta/scylla,stamhe/scylla,guiquanz/scylla,aruanruan/scylla,gwicke/scylla,asias/scylla,phonkee/scylla,kjniemi/scylla,eklitzke/scylla,shaunstanislaus/scylla,aruanruan/scylla,kangkot/scylla,avikivity/scylla,acbellini/scylla,scylladb/scylla,capturePointer/scylla,acbellini/scylla,linearregression/scylla,wildinto/scylla,asias/scylla