Update Greentea netsocket and wifi tests

Increase timeout for netsocket TCP and UDP tests. Old timeout
(240 seconds) was not enough for slower devices to complete the
tests.
Accept error codes NSAPI_ERROR_CONNECTION_TIMEOUT and
NSAPI_ERROR_NO_CONNECTION when running test wifi_connect_secure_fail

Author: juhaylinen

TESTS/netsocket/tcp/main.cpp

@@ -96,7 +96,7 @@ void fill_tx_buffer_ascii(char *buff, size_t len)
 // Test setup
 utest::v1::status_t greentea_setup(const size_t number_of_cases)
 {
-    GREENTEA_SETUP(240, "default_auto");
+    GREENTEA_SETUP(480, "default_auto");
     _ifup();
     return greentea_test_setup_handler(number_of_cases);
 }

TESTS/netsocket/udp/main.cpp

@@ -73,7 +73,7 @@ void fill_tx_buffer_ascii(char *buff, size_t len)
 // Test setup
 utest::v1::status_t greentea_setup(const size_t number_of_cases)
 {
-    GREENTEA_SETUP(240, "default_auto");
+    GREENTEA_SETUP(480, "default_auto");
     _ifup();
     return greentea_test_setup_handler(number_of_cases);
 }

TESTS/network/wifi/wifi_connect_secure_fail.cpp

@@ -30,8 +30,11 @@ void wifi_connect_secure_fail(void)
     WiFiInterface *wifi = get_interface();
 
     TEST_ASSERT_EQUAL_INT(NSAPI_ERROR_OK, wifi->set_credentials(MBED_CONF_APP_WIFI_SECURE_SSID, "aaaaaaaa", get_security()));
-
-    TEST_ASSERT_EQUAL_INT(NSAPI_ERROR_AUTH_FAILURE, wifi->connect());
+    nsapi_error_t error;
+    error = wifi->connect();
+    TEST_ASSERT(error == NSAPI_ERROR_AUTH_FAILURE ||
+                error == NSAPI_ERROR_CONNECTION_TIMEOUT ||
+                error == NSAPI_ERROR_NO_CONNECTION);
 }
 
 #endif // defined(MBED_CONF_APP_WIFI_SECURE_SSID)