Have the naming service write its connection URL to a well defined place

In order to initially bootstrap connecting to the AS, the jnp service url must be known. Unfortunately this is depending on the Service Binding Manager whose configuration we can only obtain after we connected through jnp.

The naming service should (after it has obtained its port from the SBM) write its location url to a well known file in data/

I will assume this file is named jnp-service.url

So: server/<xxx>/data/jnp-service.url