Merge pull request #2156 from gustavobgama/fix/master/linux_nfs_error

hosts/linux: fixed options to NFS: no_subtree and check became no_subtree_check

plugins/hosts/linux/host.rb

@@ -39,7 +39,7 @@ module VagrantPlugins
       def nfs_export(id, ips, folders)
         folders.each do |k, opts|
           if !opts[:linux__nfs_options]
-            opts[:linux__nfs_options] ||= ["rw", "no_subtree", "check", "all_squash"]
+            opts[:linux__nfs_options] ||= ["rw", "no_subtree_check", "all_squash"]
           end
 
           # Only automatically set anonuid/anongid if they weren't