Update MPL parameters to follow Specification

IMAX should be 80 seconds by default

Author: Mika Tervonen

source/6LoWPAN/ws/ws_config.h

@@ -103,7 +103,7 @@ extern uint8_t DEVICE_MIN_SENS;
 
 #define DATA_MESSAGE_IMIN (10 * 1000)
 #define DATA_MESSAGE_TIMER_EXPIRATIONS 3
-#define DATA_MESSAGE_IMAX (DATA_MESSAGE_IMIN)
+#define DATA_MESSAGE_IMAX (80 * 1000)
 #define MPL_SEED_SET_ENTRY_TIMEOUT (DATA_MESSAGE_IMAX * 24 * 4 / 1000) // 10 seconds per hop making this 240 seconds
 
 /* DHCP client timeout configuration values