Turn hold_in_bootloader default as false in reboot

libraries/AP_Compass/AP_Compass_Calibration.cpp

@@ -41,7 +41,7 @@ void Compass::cal_update()
         return;
     } else if (_cal_has_run && _auto_reboot()) {
         hal.scheduler->delay(1000);
-        hal.scheduler->reboot(false);
+        hal.scheduler->reboot();
     }
 }
 

libraries/AP_DroneCAN/examples/DroneCAN_sniffer/DroneCAN_sniffer.cpp

@@ -252,7 +252,7 @@ void loop(void)
     if (hal.console->available() > 50) {
         hal.console->printf("rebooting\n");
         hal.console->discard_input();
-        hal.scheduler->reboot(false);
+        hal.scheduler->reboot();
     }
     hal.console->discard_input();
 }

libraries/AP_HAL/Scheduler.h

@@ -70,7 +70,7 @@ class AP_HAL::Scheduler {
     virtual void     set_system_initialized() = 0;
     virtual bool     is_system_initialized() = 0;
 
-    virtual void     reboot(bool hold_in_bootloader) = 0;
+    virtual void     reboot(bool hold_in_bootloader = false) = 0;
 
     /**
        optional function to stop clock at a given time, used by log replay

libraries/AP_HAL_ChibiOS/Util.cpp

@@ -835,7 +835,7 @@ void Util::boot_to_dfu()
 {
     hal.util->persistent_data.boot_to_dfu = true;
     stm32_watchdog_save((uint32_t *)&hal.util->persistent_data, (sizeof(hal.util->persistent_data)+3)/4);
-    hal.scheduler->reboot(false);
+    hal.scheduler->reboot();
 }
 #endif
 

libraries/AP_InertialSensor/examples/INS_generic/INS_generic.cpp

@@ -79,7 +79,7 @@ void loop(void)
         }
 
         if (user_input == 'r') {
-            hal.scheduler->reboot(false);
+            hal.scheduler->reboot();
         }
     }
 }

libraries/AP_OSD/AP_OSD_ParamScreen.cpp

@@ -486,7 +486,7 @@ void AP_OSD_ParamScreen::update_state_machine()
             if (_selected_param == SAVE_PARAM) {
                 if (_transition_count >= OSD_HOLD_BUTTON_PRESS_COUNT) {
                     save_parameters();
-                    hal.scheduler->reboot(false);
+                    hal.scheduler->reboot();
                 } else {
                     save_parameters();
                 }

libraries/AP_Vehicle/AP_Vehicle.cpp

@@ -999,7 +999,7 @@ void AP_Vehicle::accel_cal_update()
     if (ins.accel_cal_requires_reboot() &&
         !hal.util->get_soft_armed()) {
         hal.scheduler->delay(1000);
-        hal.scheduler->reboot(false);
+        hal.scheduler->reboot();
     }
 #endif
 }