ArduCopter: incremented eeprom format version to force users to accept the new defaults.

Particularly important is the roll-pitch I term move from the stabilize to rate controllers.

ArduCopter/Parameters.h

@@ -17,7 +17,7 @@ public:
     // The increment will prevent old parameters from being used incorrectly
     // by newer code.
     //
-    static const uint16_t        k_format_version = 119;
+    static const uint16_t        k_format_version = 120;
 
     // The parameter software_type is set up solely for ground station use
     // and identifies the software type (eg ArduPilotMega versus