vagrant: Make landrush optional

It's not packaged for Fedora right now, I'm using Atomic Workstation
where I'm trying to minimize stuff installed on the host, and finally
even if I did run it, I use dnsmasq for the whole system, plus libvirt
already uses dnsmasq, so networking gets super complicated with
another resolver.

This will make it easier for me to hack on this for now...I'll
probably investigate landrush at some point though.

vagrant/Vagrantfile

@@ -15,17 +15,21 @@ origin_os = ENV['ORIGIN_OS'] || 'centos'
 rhsm_pool = ENV['RHSM_POOL'] || 'Employee SKU'
 sync_type = ENV['SYNC_TYPE'] || ''
 
+REQUIRED_PLUGINS = %w(vagrant-hostmanager)
+SUGGESTED_PLUGINS = %w(vagrant-sshfs landrush)
+
+def message(name)
+  "#{name} plugin is not installed, run `vagrant plugin install #{name}` to install it."
+end
+
+SUGGESTED_PLUGINS.each { |plugin| print("note: " + message(plugin) + "\n") unless Vagrant.has_plugin?(plugin) }
+
 if deployment_type == 'openshift-enterprise'
-  REQUIRED_PLUGINS = %w(vagrant-registration vagrant-hostmanager landrush)
-else
-  REQUIRED_PLUGINS = %w(vagrant-hostmanager landrush)
+  REQUIRED_PLUGINS.push('vagrant-registration')
 end
 
 errors = []
 
-def message(name)
-  "#{name} plugin is not installed, run `vagrant plugin install #{name}` to install it."
-end
 # Validate and collect error message if plugin is not installed
 REQUIRED_PLUGINS.each { |plugin| errors << message(plugin) unless Vagrant.has_plugin?(plugin) }
 unless errors.empty?
@@ -64,9 +68,11 @@ Vagrant.configure(VAGRANTFILE_API_VERSION) do |config|
   config.hostmanager.ignore_private_ip = false
 #  config.hostmanager.include_offline = true
 
-  config.landrush.enabled = true
-  config.landrush.tld = 'example.com'
-  config.landrush.guest_redirect_dns = false
+  if Vagrant.has_plugin?('landrush')
+    config.landrush.enabled = true
+    config.landrush.tld = 'example.com'
+    config.landrush.guest_redirect_dns = false
+  end
 
   if deployment_type == 'openshift-enterprise'
     # vagrant-registration