feat: find resolvers by role

- use puppetdbquery module to query puppetdb for resolvers
- move dns client config to profiles::dns::base
- manage the /etc/resolv.conf file

site/profiles/manifests/dns/base.pp

@@ -0,0 +1,31 @@
+# profiles::dns::base
+class profiles::dns::base (
+  String $ns_role = undef,
+  Array  $search  = [],
+  Array  $nameservers = ['8.8.8.8', '1.1.1.1'],
+){
+
+  # if ns_role is set, find all hosts matching that enc_role
+  if $ns_role == undef {
+    $nameserver_array = $nameservers
+  }else{
+    $nameserver_array = query_nodes("enc_role='${ns_role}'", 'networking.ip')
+  }
+
+  # if search is undef, fallback to domainname from facts
+  if $search == [] {
+    $search_array = [$::facts['networking']['domain']]
+  }else{
+    $search_array = $search
+  }
+
+  # include resolvconf class
+  class { 'profiles::dns::resolvconf':
+    nameservers    => $nameserver_array,
+    search_domains => $search_array,
+  }
+
+  # export dns records for client
+  profiles::dns::client {"${facts['networking']['fqdn']}-default":}
+
+}