lwip: Increased DHCP timeout to 60 seconds

This matches the timeout used in linux:
https://linux.die.net/man/5/dhclient.conf

This resolves several issues noticed during testing when we
have a very large number of devices that try to get an IP address
around the same time.

Author: geky

features/FEATURE_LWIP/TESTS/mbedmicro-net/connectivity/main.cpp

@@ -51,7 +51,7 @@ void test_bring_up_down() {
 
 // Test setup
 utest::v1::status_t test_setup(const size_t number_of_cases) {
-    GREENTEA_SETUP(60, "default_auto");
+    GREENTEA_SETUP(120, "default_auto");
     return verbose_test_setup_handler(number_of_cases);
 }
 

features/FEATURE_LWIP/TESTS/mbedmicro-net/gethostbyname/main.cpp

@@ -91,7 +91,7 @@ void test_dns_literal_pref() {
 
 // Test setup
 utest::v1::status_t test_setup(const size_t number_of_cases) {
-    GREENTEA_SETUP(60, "default_auto");
+    GREENTEA_SETUP(120, "default_auto");
     net_bringup();
     return verbose_test_setup_handler(number_of_cases);
 }

features/FEATURE_LWIP/TESTS/mbedmicro-net/tcp_echo/main.cpp

@@ -29,7 +29,7 @@ void prep_buffer(char *tx_buffer, size_t tx_size) {
 }
 
 int main() {
-    GREENTEA_SETUP(60, "tcp_echo");
+    GREENTEA_SETUP(120, "tcp_echo");
     EthernetInterface eth;
     int err = eth.connect();
 

features/FEATURE_LWIP/TESTS/mbedmicro-net/tcp_echo_parallel/main.cpp

@@ -85,8 +85,7 @@ class Echo {
 };
 
 int main() {
-    char uuid[48] = {0};
-    GREENTEA_SETUP_UUID(60, "tcp_echo", uuid, 48);
+    GREENTEA_SETUP(120, "tcp_echo");
 
     Echo echoers[MBED_CFG_TCP_CLIENT_ECHO_THREADS];
 

features/FEATURE_LWIP/TESTS/mbedmicro-net/tcp_hello_world/main.cpp

@@ -36,7 +36,7 @@ bool find_substring(const char *first, const char *last, const char *s_first, co
 }
 
 int main() {
-    GREENTEA_SETUP(60, "default_auto");
+    GREENTEA_SETUP(120, "default_auto");
 
     bool result = false;
     EthernetInterface eth;

features/FEATURE_LWIP/TESTS/mbedmicro-net/tcp_packet_pressure/main.cpp

@@ -108,7 +108,7 @@ void generate_buffer(uint8_t **buffer, size_t *size, size_t min, size_t max) {
 
 
 int main() {
-    GREENTEA_SETUP(60, "tcp_echo");
+    GREENTEA_SETUP(120, "tcp_echo");
     generate_buffer(&buffer, &buffer_size,
         MBED_CFG_TCP_CLIENT_PACKET_PRESSURE_MIN,
         MBED_CFG_TCP_CLIENT_PACKET_PRESSURE_MAX);
@@ -219,7 +219,7 @@ int main() {
     timer.stop();
     printf("MBED: Time taken: %fs\r\n", timer.read());
     printf("MBED: Speed: %.3fkb/s\r\n",
-            8*(2*MBED_CFG_TCP_CLIENT_PACKET_PRESSURE_MAX - 
+            8*(2*MBED_CFG_TCP_CLIENT_PACKET_PRESSURE_MAX -
             MBED_CFG_TCP_CLIENT_PACKET_PRESSURE_MIN) / (1000*timer.read()));
 
     eth.disconnect();

features/FEATURE_LWIP/TESTS/mbedmicro-net/tcp_packet_pressure_parallel/main.cpp

@@ -225,7 +225,7 @@ PressureTest *pressure_tests[MBED_CFG_TCP_CLIENT_PACKET_PRESSURE_THREADS];
 
 
 int main() {
-    GREENTEA_SETUP(2*60, "tcp_echo");
+    GREENTEA_SETUP(120, "tcp_echo");
 
     uint8_t *buffer;
     size_t buffer_size;
@@ -282,7 +282,7 @@ int main() {
     printf("MBED: Time taken: %fs\r\n", timer.read());
     printf("MBED: Speed: %.3fkb/s\r\n",
             MBED_CFG_TCP_CLIENT_PACKET_PRESSURE_THREADS*
-            8*(2*MBED_CFG_TCP_CLIENT_PACKET_PRESSURE_MAX - 
+            8*(2*MBED_CFG_TCP_CLIENT_PACKET_PRESSURE_MAX -
             MBED_CFG_TCP_CLIENT_PACKET_PRESSURE_MIN) / (1000*timer.read()));
 
     net.disconnect();

features/FEATURE_LWIP/TESTS/mbedmicro-net/udp_dtls_handshake/main.cpp

@@ -28,7 +28,7 @@ int udp_dtls_handshake_pattern[] = {MBED_CFG_UDP_DTLS_HANDSHAKE_PATTERN};
 const int udp_dtls_handshake_count = sizeof(udp_dtls_handshake_pattern) / sizeof(int);
 
 int main() {
-    GREENTEA_SETUP(60, "udp_shotgun");
+    GREENTEA_SETUP(120, "udp_shotgun");
 
     EthernetInterface eth;
     int err = eth.connect();

features/FEATURE_LWIP/TESTS/mbedmicro-net/udp_echo/main.cpp

@@ -43,7 +43,7 @@ void prep_buffer(char *uuid_buffer, size_t uuid_len, char *tx_buffer, size_t tx_
 
 int main() {
     char uuid[48] = {0};
-    GREENTEA_SETUP_UUID(60, "udp_echo", uuid, 48);
+    GREENTEA_SETUP_UUID(120, "udp_echo", uuid, 48);
     printf("Got a uuid of %s\r\n", uuid);
     size_t uuid_len = strlen(uuid);
     EthernetInterface eth;

features/FEATURE_LWIP/TESTS/mbedmicro-net/udp_echo_parallel/main.cpp

@@ -144,7 +144,7 @@ class Echo {
 
 int main() {
     char uuid[48] = {0};
-    GREENTEA_SETUP_UUID(60, "udp_echo", uuid, 48);
+    GREENTEA_SETUP_UUID(120, "udp_echo", uuid, 48);
     printf("Got a uuid of %s\r\n", uuid);
     size_t uuid_len = strlen(uuid);