Require swift package installation before swift user.

- The user 'swift' is being ensured without any restriction on openstack-swift
package, so it is highly potential that the user is created before package is
installed with /bin/bash instead of /sbin/nologin as shell.

Closes-bug: #1525243
Change-Id: I4c7b7afb7eefeda0379db631f14eb8c32cbe8671
Signed-off-by: Gael Chamoulaud <gchamoul@redhat.com>

manifests/init.pp

@@ -55,7 +55,8 @@ class swift(
     ensure => directory,
   }
   user {'swift':
-    ensure => present,
+    ensure  => present,
+    require => Package['swift'],
   }
   file { '/var/lib/swift':
     ensure => directory,