db_kazoo.patch: small fixes

Removed some hard coded values for Node name.
Added module parameter node_hostname which must be set to the hostname
that should appear in the "Node" and "Kamailio-Hostname" Json fields.

Added module parameter fs_path - if this parameter is set, the fs_path
field in the register notice Json will contain this value, otherwise it
will be constructed from IP:PORT where the message was received.

usrloc.patch : updated to the latest 4.0 git branch