BUG-1541 Netconf device simulating testtool

Produces executable jar file.

The jar can simulate arbitrary number of netconf devices that listen on configured ports
Schemas are loaded from a provided folder
Can also generate ODL initial config files for started simulated devices to support testing with ODL distribution

Change-Id: I8fce73fa7c568a272c29073f26a4e8aafeebfd82
Signed-off-by: Maros Marsalek <mmarsale@cisco.com>