tests: Remove extra test by moving getsockname() to another

tests: Remove extra test by moving getsockname() to another

test_echo_tcp_socket currently tests socket() and getsockname() network
calls. The test name was misleading as it does not require echo server
to be setup. Moreover it failed to create socket_wrapper directory which
is the pre-requisite for testing with libsocket_wrapper.

Therefore it is better to integrate getsockname() test into existing
test_tcp_listen test and remove useless test_echo_tcp_socket

Signed-off-by: Anoop C S <anoopcs@redhat.com>
Reviewed-by: Andreas Schneider <asn@samba.org>
Reviewed-by: Andrew Bartlet <abartlet@samba.org>