Rename the test to virnetdaemontest and use virNetDaemon objects instead
of virNetServer inside.
Signed-off-by: NMartin Kletzander <mkletzan@redhat.com>

The virNetServer class has the ability to serialize its state
to a JSON file, and then re-load that data after an in-place
execve() call to re-connect to active file handles. This data
format is critical ABI that must have compatibility across
releases, so it should be tested...