hosts/*: proper detect API

lib/vagrant/plugin/v2/host.rb

@@ -10,7 +10,7 @@ module Vagrant
         # matches the host class.
         #
         # @return [Boolean]
-        def detect?
+        def detect?(env)
           false
         end
       end

plugins/hosts/freebsd/host.rb

@@ -4,7 +4,7 @@ require 'vagrant/util/platform'
 module VagrantPlugins
   module HostFreeBSD
     class Host < Vagrant.plugin("2", :host)
-      def self.detect?(env)
+      def detect?(env)
         Vagrant::Util::Platform.freebsd?
       end
     end

plugins/hosts/gentoo/host.rb

@@ -3,7 +3,7 @@ require "vagrant"
 module VagrantPlugins
   module HostGentoo
     class Host < Vagrant.plugin("2", :host)
-      def self.detect?(env)
+      def detect?(env)
         File.exists?("/etc/gentoo-release")
       end
     end

plugins/hosts/linux/host.rb

@@ -4,7 +4,7 @@ module VagrantPlugins
   module HostLinux
     # Represents a Linux based host, such as Ubuntu.
     class Host < Vagrant.plugin("2", :host)
-      def self.detect?(env)
+      def detect?(env)
         Vagrant::Util::Platform.linux?
       end
     end

plugins/hosts/opensuse/host.rb

@@ -5,7 +5,7 @@ require "vagrant"
 module VagrantPlugins
   module HostOpenSUSE
     class Host < Vagrant.plugin("2", :host)
-      def self.detect?(env)
+      def detect?(env)
         release_file = Pathname.new("/etc/SuSE-release")
 
         if release_file.exist?

plugins/hosts/redhat/host.rb

@@ -5,7 +5,7 @@ require "vagrant"
 module VagrantPlugins
   module HostRedHat
     class Host < Vagrant.plugin("2", :host)
-      def self.detect?(env)
+      def detect?(env)
         release_file = Pathname.new("/etc/redhat-release")
 
         if release_file.exist?

plugins/hosts/slackware/host.rb

@@ -3,7 +3,7 @@ require "vagrant"
 module VagrantPlugins
   module HostSlackware
     class Host < Vagrant.plugin("2", :host)
-      def self.detect?(env)
+      def detect?(env)
         return File.exists?("/etc/slackware-release") ||
           !Dir.glob("/usr/lib/setup/Plamo-*").empty?
       end

plugins/hosts/windows/host.rb

@@ -5,7 +5,7 @@ require 'vagrant/util/platform'
 module VagrantPlugins
   module HostWindows
     class Host < Vagrant.plugin("2", :host)
-      def self.detect?(env)
+      def detect?(env)
         Vagrant::Util::Platform.windows?
       end
     end