Fix token_flush command

keystone-manage is using token_flush and not token-flush. Also
stdout and stderr redirection has been fixed.

Change-Id: Ia35574be51c415c49f80276b510caca1ab0b994f

packstack/puppet/templates/keystone.pp

@@ -20,7 +20,7 @@ class {"keystone::endpoint":
 # Run token flush every minute (without output so we won't spam admins)
 cron { 'token-flush':
     ensure => 'present',
-    command => '/usr/bin/keystone-manage token-flush 2>&1 >/dev/null',
+    command => '/usr/bin/keystone-manage token_flush >/dev/null 2>&1',
     minute => '*/1',
 } -> service { 'crond':
     ensure => 'running',