Change unprotected netconf address from 0.0.0.0 to 127.0.0.1 .

Plaintext netconf server was bound to any local interface. This is a security risk
because there is no authentication. The ssh server should be used as public endpoint instead.

Change-Id: I805ec065548e017dd2244d37e3275d379761e490
Signed-off-by: Tomas Olvecky <tolvecky@cisco.com>