Replace remaining validate_legacy

... because the validate_legacy function is marked for deprecation in
v9.0.0 from puppetlabs-stdlib.

NOTE:
- validation about service_providers has been removed for now, because
  we haven't yet implemented appropriate validations for MultiStrOpt

- validation logic in neutron::ml2::arista::l3 has been removed and
  will be reconsidered when we implement more global validation about
  BooleanOpt.

Change-Id: I4ecfbff4ad40516692b7bed51d7b422548954f10

manifests/plugins/ml2/arista/l3.pp

@@ -64,12 +64,14 @@ class neutron::plugins::ml2::arista::l3(
   include neutron::deps
   require neutron::plugins::ml2
 
-  if !is_service_default($mlag_config) {
-    validate_legacy(Boolean, 'validate_bool', $mlag_config)
-    if $mlag_config and is_service_default($secondary_l3_host) {
-      fail('Must set secondary_l3_host when mlag_config is true.')
-    }
-  }
+  # TODO(tkajinam): Reconsider how we implement this. We probably should allow
+  #                 more flexible values like 'on' supported by oslo.config.
+  # if !is_service_default($mlag_config) {
+  #   validate_legacy(Boolean, 'validate_bool', $mlag_config)
+  #   if $mlag_config and is_service_default($secondary_l3_host) {
+  #     fail('Must set secondary_l3_host when mlag_config is true.')
+  #   }
+  # }
 
   neutron_plugin_ml2 {
     'l3_arista/primary_l3_host'         : value => $primary_l3_host;

manifests/server.pp

@@ -282,12 +282,9 @@ class neutron::server (
   include neutron::policy
 
   if !is_service_default($dhcp_load_type) {
-    validate_legacy(Enum['networks', 'subnets', 'ports'], 'validate_re', $dhcp_load_type,
-      [['^networks$', '^subnets$', '^ports$']])
-  }
-
-  if !is_service_default($service_providers) {
-    validate_legacy(Array, 'validate_array', $service_providers)
+    if ! ($dhcp_load_type in ['networks', 'subnets', 'ports'] ) {
+      fail('Unsupported dhcp_load_type. It should be one of networks, subnets and ports.')
+    }
   }
 
   if $ensure_vpnaas_package {

manifests/services/l2gw.pp

@@ -56,10 +56,6 @@ class neutron::services::l2gw (
   include neutron::deps
   include neutron::params
 
-  if !is_service_default($service_providers) {
-    validate_legacy(Array, 'validate_array', $service_providers)
-  }
-
   ensure_resource( 'package', 'python-networking-l2gw', {
     'ensure' => $package_ensure,
     'name'   => $::neutron::params::l2gw_package,

spec/classes/neutron_plugins_ml2_arista_l3_spec.rb

@@ -61,18 +61,6 @@ describe 'neutron::plugins::ml2::arista::l3' do
       should contain_neutron_plugin_ml2('l3_arista/conn_timeout').with_value(p[:conn_timeout])
       should contain_neutron_plugin_ml2('l3_arista/use_vrf').with_value(p[:use_vrf])
     end
-
-    context 'with mlag enabled but secondary l3 host missing' do
-      before :each do
-        params.merge!({
-          :mlag_config => true
-        })
-      end
-
-      it 'should fail' do
-        should raise_error(Puppet::Error, /Must set secondary_l3_host when mlag_config is true./)
-      end
-    end
   end
 
   on_supported_os({