Vagrant: Introduce base profile and install vim

This happened too often with `vim: not found`, so I've patched it.

.puppet/manifests/site.pp

@@ -6,6 +6,7 @@ node default {
   class { 'epel':
     stage => repositories,
   }
+  include base
   include icinga2_dev
   include icingaweb2_dev
   include motd

.puppet/profiles/base/manifests/init.pp

@@ -0,0 +1,5 @@
+class base {
+  package { [ 'vim-enhanced', 'bash-completion' ]:
+    ensure => latest,
+  }
+}