tests: net: socket: tcp: Disable IPv6 ND

There is a test case which verifies that no new packets show up on the
interface, assuming that the only source of the packets is TCP stack.
ND protocol could interfere with that assumption, sending
advertisements.

Signed-off-by: Robert Lubos <[email protected]>

Author: rlubos

tests/net/socket/tcp/prj.conf

@@ -8,6 +8,7 @@ CONFIG_NEWLIB_LIBC=y
 CONFIG_NETWORKING=y
 CONFIG_NET_IPV4=y
 CONFIG_NET_IPV6=y
+CONFIG_NET_IPV6_ND=n
 CONFIG_NET_TCP=y
 CONFIG_NET_SOCKETS=y
 CONFIG_NET_SOCKETS_POSIX_NAMES=y