Fix lp_ticker and ticker unit test case wait times

Author: hugueskamba

TESTS/mbed_drivers/lp_ticker/main.cpp

@@ -143,7 +143,7 @@ void test_detach(void)
     LowPowerTicker ticker;
     bool ret;
     const s_timestamp_t ticker_time_s = 1;
-    const uint32_t wait_time_ms = 500;
+    const uint32_t wait_time_ms = 5000;
     Semaphore sem(0, 1);
 
     ticker.attach_s(callback(sem_release, &sem), ticker_time_s);

TESTS/mbed_drivers/ticker/main.cpp

@@ -265,7 +265,7 @@ void test_detach(void)
     Ticker ticker;
     bool ret;
     const s_timestamp_t ticker_time_s = 1;
-    const uint32_t wait_time_ms = 500;
+    const uint32_t wait_time_ms = 5000;
     Semaphore sem(0, 1);
 
     ticker.attach_s(callback(sem_release, &sem), ticker_time_s);