Add methods for provider mapping supportability in ExtManagementSystem

app/models/ext_management_system.rb

@@ -50,6 +50,18 @@ def self.supported_for_catalog?
     catalog_types.present?
   end
 
+  def self.label_mapping_classes
+    supported_subclasses.select(&:supports_label_mapping?)
+  end
+
+  def self.label_mapping_prefixes
+    label_mapping_classes.map(&:label_mapping_prefix)
+  end
+
+  def self.entities_for_label_mapping
+    label_mapping_classes.reduce({}) { |all_mappings, klass| all_mappings.merge(klass.entities_for_label_mapping) }
+  end
+
   def self.provider_create_params
     supported_types_for_create.each_with_object({}) do |ems_type, create_params|
       create_params[ems_type.name] = ems_type.params_for_create if ems_type.respond_to?(:params_for_create)

app/models/mixins/supports_feature_mixin.rb

@@ -98,6 +98,7 @@ module SupportsFeatureMixin
     :launch_html5_console                => 'Launch HTML5 Console',
     :launch_vmrc_console                 => 'Launch VMRC Console',
     :launch_native_console               => 'Launch Native Console',
+    :label_mapping                       => 'Label Mapping',
     :admin_ui                            => 'Open Admin UI for a Provider',
     :live_migrate                        => 'Live Migration',
     :warm_migrate                        => 'Warm Migration',