deprecate a few more LDAP config options
deprecate a few more LDAP config options

These options should have been deprecated in Mitaka (when LDAP
write support was deprecated), but were missed. Mark them as
deprecated now.

bp deprecated-as-of-newton

Change-Id: I683c1cb27ff28d7600e743fe9a17ceab112a5ad3

cernops/keystone,cernops/keystone,rajalokan/keystone,openstack/keystone,openstack/keystone,rajalokan/keystone,ilay09/keystone,ilay09/keystone,mahak/keystone,mahak/keystone,openstack/keystone,rajalokan/keystone,ilay09/keystone,mahak/keystone