Fix nfs::server4 for CentOS 8
Fix nfs::server4 for CentOS 8

* Fix nfs::server4 for CentOS 8 by providing the correct idmap service name, nfs-idmapd

Signed-off-by: Rex <499cbe66472cda95e5f4c0a9aebc47f348694a24@amazon.com>

atomic-penguin/cookbook-nfs,atomic-penguin/cookbook-nfs