Change service name/fromLL -> fromLL

[Rezenders]

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Primary OS tested on	Ubuntu
Robotic platform tested on	None
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Description of contribution in a few bullet points

Shouldn't the from_ll_to_map_client_ service client have a relative name fromLL instead of a global name /fromLL to match the from_ll_srv_ service server name defined in the navsat_transform_node from robot_localization?

navigation2/nav2_waypoint_follower/src/waypoint_follower.cpp

Lines 80 to 82 in e728284

	from_ll_to_map_client_ = node->create_client<robot_localization::srv::FromLL>(
	"/fromLL",
	true /*creates and spins an internal executor*/);

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Description of how this change was tested

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Future work that may be required in bullet points

For Maintainers:

• Check that any new parameters added are updated in docs.nav2.org
• Check that any significant change is added to the migration guide
• Check that any new features OR changes to existing behaviors are reflected in the tuning guide
• Check that any new functions have Doxygen added
• Check that any new features have test coverage
• Check that any new plugins is added to the plugins page
• If BT Node, Additionally: add to BT's XML index of nodes for groot, BT package's readme table, and BT library lists
• Should this be backported to current distributions? If so, tag with backport-*.

[SteveMacenski]

The problem with this is that then the service will be placed under a namespace that the waypoint follower node is placed in -- not the namespace that potentially the robot localization node is. I think this may be better to be remapped in your launch file from /fromLL -> /my_rl_ns/fromLL that way you explicitly control what namespace this is applied to. There's no reason to expect that the namespace of the WPF will be the same as RL - especially if you consider that many GPS applications may have 2 or 3 RL instances that could either be named uniquely or namespaced uniquely - separate of the application namespace itself.