I think I figure this out:

Line: 27
file: /usr/lib/python2.7/site-packages/cinder/keymgr/key_mgr.py

this was the default param on cinder key manager which was:

               default='http://localhost:5000/v3',
which I updated it with:
               default='http://10.20.30.26:5000/v3',
and that was all....

but it's the default library value I thinks, and it should be possible to be overwrite on some configuration files i hope... (ex: /etc/cinder/api-paste.ini)