Use latest virtualenv.

Have pip install the latest virtualenv.

Change-Id: Ifc5d32c36bf4231d1c0085e3e69ad879746bfb20
Reviewed-on: https://review.openstack.org/13804
Reviewed-by: James E. Blair <corvus@inaugust.com>
Approved: Monty Taylor <mordred@inaugust.com>
Reviewed-by: Monty Taylor <mordred@inaugust.com>
Tested-by: Jenkins

modules/openstack_project/manifests/base.pp

@@ -29,13 +29,19 @@ class openstack_project::base(
   $packages = [
     'puppet',
     'python-setuptools',
-    'python-virtualenv'
   ]
 
   package { $packages:
     ensure => 'present'
   }
 
+  include pip
+  package { 'virtualenv':
+    ensure => latest,
+    provider => pip,
+    require => Class[pip]
+  }
+
   if ($install_users) {
     package { ['byobu', 'emacs23-nox']:
       ensure => 'present'