ldap authentication

I'm working with bonita community edition 7.x trying to implement an LDAP authentication with bonita engine and no matter the configuration and jars i add, the bonita engine just doesn't respond, i couln't change the default authentication on bonita and i was wondering if there's anyone with a similar problem and if they did change the bonita's default Authentication method to teach me how to do it.

i tried to work with the git repo https://github.com/Bonitasoft-Community/JaasBonitaLogin

Hi folks,
the community version of BOS does not provide LDAP. We urgently need it :)

I've seen many posts, but no real solution.
I've found this http://community.bonitasoft.com/project/ldap-aware-identityservice which provides bonita-auth.jar

Does someone have an idea on how to place and include bonita-auth.jar, so that it is used by Bonita?

I am configuring ldap authentication and but I am having the error: