NGSI10 Subscriptions with ServicePath

### Also not a PR

This 'failed test' comes complete with the logfile of the broker, and a description of the test (see the file SUBS_PATH), including contents in mongo after the test.

## Will NOT be merged, but discarded after discussion


"/" match also?
That is not 100% logic (to me).
And no, that I have not implemented.
Please elaborate on the reason as to the match for "/".