Just chiming in because I checked it out as well yesterday. There are only versions for Tumbleweed and 42.3. There aren’t any non-“Experimental” (unstable) for 15.
To configure LEAP15 for OpenLDAP client, it should be configure with User Logon Management.
Previously I was try to configure it with LDAP and Kerberos Client, which showed me the error message, “Failed to install software packages required for LDAP”.