AP_FlashStorage: adjust example so it does not exit

libraries/AP_FlashStorage/examples/FlashTest/FlashTest.cpp

@@ -104,12 +104,16 @@ void FlashTest::write(uint16_t offset, const uint8_t *data, uint16_t length)
  * test flash storage
  */
 void FlashTest::setup(void)
+{
+    hal.console->printf("AP_FlashStorage test\n");
+}
+
+void FlashTest::loop(void)
 {
     flash[0] = (uint8_t *)malloc(flash_sector_size);
     flash[1] = (uint8_t *)malloc(flash_sector_size);
     flash_erase(0);
     flash_erase(1);
-    hal.console->printf("AP_FlashStorage test\n");
 
     if (!storage.init()) {
         AP_HAL::panic("Failed first init()");
@@ -154,12 +158,10 @@ void FlashTest::setup(void)
     if (memcmp(mem_buffer, mem_mirror, sizeof(mem_buffer)) != 0) {
         AP_HAL::panic("FATAL: data mis-match");
     }
-    AP_HAL::panic("TEST PASSED");
-}
-
-void FlashTest::loop(void)
-{
-    hal.console->printf("loop\n");
+    while (true) {
+        hal.console->printf("TEST PASSED");
+        hal.scheduler->delay(20000);
+    }
 }
 
 FlashTest flashtest;