Adding centos.pp class to fix error found during puppet run

W/o this class, I get errors during a puppet run on a Centos 6.5 master and agent

Error: Could not retrieve catalog from remote server: Error 400 on SERVER: Could not find class ldap::os::CentOS for host01.c.com on node host01.c.com
Warning: Not using cache on failed catalog
Error: Could not retrieve catalog; skipping run