Prepare for multiple hidden services

On trade complete and app shutdown, we check for hidden services
that are still in active trades. We shut down all unused hidden
services.

Tests run smoothly on my machine, Travis shows successes but also
fails on the same code base.

I disable the tests for now, maybe someone can try to reproduce the
failing tests?

In the peer exchange procedure, a remote client will report one of
our own passive network nodes (nodes that have been used in the
past, have been replaced by a new active node, but are kept until
all ongoing trades are completed)

Previously, only one node address was active and the checks have
only been done for this address. Now that there are multiple active
node addresses, we have to perform the check to respect ALL our
nodes