Update Karaf shell command to support injection of a configuration pid

[mattrpav]

Currently, services can be injected. To get a configuration pid for a command, one must reference the ConfigurationAdmin service and look-up the pid. It'd be smoother developer experience if the properties were injected to the command by the shell session.

[jbonofre]

You mean similar to config:list "(service.pid=foo.bar)" ?

[mattrpav]

Something like this:

@Config("service.pid=foo.bar")
Map<String, Object> properties = new LinkedHashMap<>();