Send the correct address to the service registry if local address is the wildcard address

[emanuelpalm]

Currently, if not setting any local IP address when creating a system, the HttpJsonCloudPlugin is going to register the system with the IP address of 0.0.0.0 for each of its services, which leads to the services not being accessible.

In Eclipse Arrowhead version 4.4, registering all-zeroes/wildcard addresses are likely going to have a different result. See eclipse-arrowhead/core-java-spring#265.

@InRiPa Do you have any ideas about what we should do until then? Should we automatically extract one Subject Alternative Name from the system certificate and try to register that? Require that a local interface address is provided when creating a new ArSystem or throw an exception?

[emanuelpalm]

Also see arrowhead-f/arrowhead-kalix-examples#6.