Removed php5.5 compatibility patch and added password_hash_custom patch

Recent Ubuntu 14.04 phpldapadmin packages include the php5.5 fix. This commit
removes the Puppet-managed fix and adds a new patch to fix a new problem in
lib/TemplateRender.php.

Signed-off-by: Samuli Seppänen <samuli@openvpn.net>