In templates, remove "lstrip('/')" from full node name

[Rezenders]

In the current version, the model generation removes the leading slash (the leftmost one), which is fine for nodes that don't contain any slashes in its name, but for nodes containing slashes, such as, /mavros/mavros, /mavros/cmd etc the .ros2 DSL checkers complain.

I get these 2 errors:

Description	Resource	Path	Location	Type
The required feature 'name' of 'ros.impl.NodeImpl@67384d19{platform:/resource/suave_rebetmc/models/ros/mavros__mavros_router.ros2#//@artifact.0/@node}' must be set	mavros__mavros_router.ros2	

Invalid token mavros/mavros_router mavros__mavros_router.ros2	/suave_rebetmc/models/ros	line 4	Ros2 Problem

Adding a leading slash solves the problem. The issue is only with the .ros2 DSL but I also made the same change to the .rossystem DSL to make it consistent. Not sure if this should be fixed/changed in RosTooling itself or only in the generation.