bts_defs.json; require vcsrepo, not file

The creation of this file should depend on the Vcsrepo, not on the File
directive, otherwise on an initial install if the file is created first,
then Vcsrepo will refuse to clone the repo:

  Error: Path /var/rhizomatica exists and is not the desired repository.

modules/rhizo_base/manifests/init.pp

@@ -415,7 +415,7 @@ schedule { 'never':
   file { '/var/rhizomatica/bts_defs.json':
       ensure  => present,
       content => template('rhizo_base/bts_defs.json.erb'),
-      require => File['/var/rhizomatica'],
+      require => Vcsrepo['/var/rhizomatica'],
     }
 
   file { '/var/meas/www/meas-web/bts_defs.js':