BUG 624 - Make netconf TCP port optional.

Previously netconf-impl opened a TCP port with no authentication on
localhost, and netconf-ssh used it as a bridge to forward trafic
after processing authentication and encryption.

This patch creates new project netconf-tcp and modifies netconf-impl
to open the netconf server on LocalAddress. Both tcp and ssh modules
now communicate with this local server.
Config ini is modified so that the TCP port (8383) is not enabled
by default.

Change-Id: I74bded660f10b20d09535d32308aff5b2ae611d9
Signed-off-by: Tomas Olvecky <tolvecky@cisco.com>