Move strings into locales file

plugins/providers/docker/action/destroy_network.rb

@@ -29,7 +29,7 @@ module VagrantPlugins
 
             if machine.provider.driver.existing_network?(network_name) &&
                 !machine.provider.driver.network_used?(network_name)
-              env[:ui].info("Removing network #{network_name}")
+              env[:ui].info(I18n.t("docker_provider.network_destroy", network_name: network_name))
               machine.provider.driver.rm_network(network_name)
             else
               @logger.debug("Network #{network_name} not found")

plugins/providers/docker/action/network.rb

@@ -51,7 +51,7 @@ module VagrantPlugins
             return @app.call(env)
           end
 
-          env[:ui].info("Configuring and enabling network interfaces...")
+          env[:ui].info(I18n.t("docker_provider.network_configure"))
 
           machine.config.vm.networks.each do |type, options|
             # We only handle private networks

templates/locales/providers_docker.yml

@@ -45,6 +45,10 @@ en:
       This container requires a host VM, and the state of that VM
       is unknown. Run `vagrant up` to verify that the container and
       its host VM is running, then try again.
+    network_configure: |-
+      Configuring and enabling network interfaces...
+    network_destroy: |-
+      Removing network %{network_name} ...
     not_created_skip: |-
       Container not created. Skipping.
     not_docker_provider: |-