global: use static method to construct AP_Relay

APMrover2/Rover.h

@@ -202,7 +202,7 @@ private:
     GCS_Rover &gcs() { return _gcs; }
 
     // relay support
-    AP_Relay relay;
+    AP_Relay relay = AP_Relay::create();
 
     AP_ServoRelayEvents ServoRelayEvents;
 

ArduCopter/Copter.h

@@ -536,7 +536,7 @@ private:
     uint8_t auto_trim_counter;
 
     // Reference to the relay object
-    AP_Relay relay;
+    AP_Relay relay = AP_Relay::create();
 
     // handle repeated servo and relay events
     AP_ServoRelayEvents ServoRelayEvents;

ArduPlane/Plane.h

@@ -267,7 +267,7 @@ private:
     AP_SpdHgtControl *SpdHgt_Controller = &TECS_controller;
 
     // Relay
-    AP_Relay relay;
+    AP_Relay relay = AP_Relay::create();
 
     // handle servo and relay events
     AP_ServoRelayEvents ServoRelayEvents {relay};

ArduSub/Sub.h

@@ -408,7 +408,7 @@ private:
     uint16_t mainLoop_count;
 
     // Reference to the relay object
-    AP_Relay relay;
+    AP_Relay relay = AP_Relay::create();
 
     // handle repeated servo and relay events
     AP_ServoRelayEvents ServoRelayEvents;

libraries/AP_Parachute/examples/AP_Parachute_test/AP_Parachute_test.cpp

@@ -19,7 +19,7 @@ void loop();
 const AP_HAL::HAL& hal = AP_HAL::get_HAL();
 
 // Relay
-AP_Relay relay;
+static AP_Relay relay = AP_Relay::create();
 
 // Parachute
 AP_Parachute parachute(relay);