Yes it is created by default at startup and is ou=admin,ou=system with password 'secret'. All are advised to change this after startup.
SSL is a little more complex because we have 2 options for configuring it. The first option creates a self signed cert at startup and uses that. The other option is to use the configuration to point to an existing cert file. The documentation should show you how to manage both.
How to configure an embedded Apache DS
I see examples in the documentation of the version 1.5.4.
But how configure password of admin user ? Is it created by default at startup ?
How to configure ssl ...
Thanks for help