Revert "CLOUDSTACK-5435 enabled encryption for ldap params"

This reverts commit 24392c15f561fa07fd5f707bbfa6910d880c3a3b.

Signed-off-by: Abhinandan Prateek <aprateek@apache.org>
CLOUDSTACK-5790: decrypted ldap hostname and port during upgrade as they are not encrypted now.

Signed-off-by: Abhinandan Prateek <aprateek@apache.org>