nftables::simplerule should follow the same rules as nftables::rule

[nbarrientos]

How to reproduce (e.g Puppet code you use)

  nftables::simplerule{'thanos_gRPC-store':
    action => 'accept',
    dport  => 161,
    proto  => 'udp6',
    saddr  => '2001:1458:d00:3b::100:23b',
  }

What are you seeing

Error while evaluating a Resource Statement, Nftables::Rule[default_in-thanos_gRPC-store]: parameter 'rulename' expects a match for Pattern[/^[a-zA-Z0-9_]+-[a-zA-Z0-9_]+(-\d+)?$/], got 'default_in-thanos_gRPC-store'

What behaviour did you expect instead

Compilation faillure, but at nftables::simplerule level.

This regex:

https://github.com/duritong/puppet-nftables/blob/master/manifests/simplerule.pp#L57

Should be a mirror of the second part of this one:

https://github.com/duritong/puppet-nftables/blob/master/manifests/rule.pp#L6

Trivial fix. Add a test to cover a possible regression.