Add concat_basedir fact

This commit adds the required fact concat_basedir so that
the concat module (which is a dependency for some glance classes) will not fail.

This change is necesary b/c we have switched from the puppetlabs version to
ri's version of concat.

spec/classes/swift_storage_all_spec.rb

@@ -5,6 +5,7 @@ describe 'swift::storage::all' do
 
   let :facts do
     {
+      :concat_basedir  => '/tmp/',
       :operatingsystem => 'Ubuntu',
       :osfamily        => 'Debian'
     }