List container improvements and testing

- support range based for loops
 - add remove() method to remove a node
 - add clear() to empty entire list and delete nodes
 - add empty() helper

src/modules/mavlink/mavlink_stream.cpp

@@ -45,7 +45,6 @@
 #include "mavlink_main.h"
 
 MavlinkStream::MavlinkStream(Mavlink *mavlink) :
-	ModuleParams(nullptr),
 	_mavlink(mavlink)
 {
 	_last_sent = hrt_absolute_time();