Check for exempt subcommands & move vagrantplugins to vagrant dir.

Moved logic to check if plugin installation check
is necessary into vagrantplugins.rb.

vagrant/base/analyticstack/Vagrantfile

 Vagrant.require_version ">= 1.8.7"
-
-unless ARGV.empty?
-  require_relative '../../../vagrantplugins'
-  install_plugins(['vagrant-vbguest'])
-end
+require_relative '../../vagrantplugins'
+install_plugins(['vagrant-vbguest'])
 
 VAGRANTFILE_API_VERSION = "2"
 

vagrant/base/devstack/Vagrantfile

 Vagrant.require_version ">= 1.8.7"
-
-unless ARGV.empty?
-  require_relative '../../../vagrantplugins'
-  install_plugins(['vagrant-vbguest'])
-end
+require_relative '../../vagrantplugins'
+install_plugins(['vagrant-vbguest'])
 
 VAGRANTFILE_API_VERSION = "2"
 

vagrant/release/analyticstack/Vagrantfile

 Vagrant.require_version ">= 1.8.7"
+require_relative '../../vagrantplugins'
+install_plugins(['vagrant-vbguest'])
 
-unless ARGV.empty?
-  require_relative '../../../vagrantplugins'
-  install_plugins(['vagrant-vbguest'])
-end
 
 VAGRANTFILE_API_VERSION = "2"
 

vagrant/release/devstack/Vagrantfile

 Vagrant.require_version ">= 1.8.7"
-
-unless ARGV.empty?
-  require_relative '../../../vagrantplugins'
-  install_plugins(['vagrant-vbguest'])
-end
+require_relative '../../vagrantplugins'
+install_plugins(['vagrant-vbguest'])
 
 VAGRANTFILE_API_VERSION = "2"
 

vagrantplugins.rb → vagrant/vagrantplugins.rb

+# Don't check for plugins on certain subcommands of vagrant.
+def is_check_necessary
+    exempt = ['help', 'plugin', 'version']
+    return ARGV.any? ? (ARGV & exempt).empty? : false
+end
+
 def install_plugins(plugins)
+    if not is_check_necessary
+	exit
+    end
+
     not_installed = get_not_installed(plugins)
     if not_installed.any?
 	puts "The following required plugins must be installed:"