swift-concat requires swift-file dependency

In a case where /etc/swift/<type>-server/<config_files>
is used, need to ensure that the directory is created
before the concat resource attempts to write a config
file there.

Change-Id: I3f62a2bcd65b429518327f43918871d4263d35fb

manifests/deps.pp

@@ -39,6 +39,7 @@ class swift::deps {
 
   Anchor['swift::config::begin']
   -> File<| tag == 'swift-file' |>
+  -> Concat<| tag == 'swift-concat' |>
   ~> Anchor['swift::config::end']
 
   # Support packages need to be installed in the install phase, but we don't

manifests/storage/server.pp

@@ -218,6 +218,7 @@ define swift::storage::server(
     group   => $group,
     notify  => Service["swift-${type}-server", "swift-${type}-replicator", "swift-${type}-auditor"],
     require => Package['swift'],
+    tag     => 'swift-concat',
   }
 
   $required_middlewares = split(