Initial Clearing Costmap parameter change
Empty tests
Add rostest/gtest
Move testing_helper
Add method for removing static observations (for testing)
First working test
Destruction and chaos (deleting the dynamic param clients)
Refactored tests
Merge remote-tracking branch 'upstream/hydro-devel' into clear_recovery_array2

Conflicts:
	costmap_2d/include/costmap_2d/footprint_layer.h
	costmap_2d/include/costmap_2d/static_layer.h
	costmap_2d/plugins/obstacle_layer.cpp
Fix bad merge
Just whitespace
Clarify debug messages
Costmap Layer comments
Merge pull request #230 from DLu/clear_recovery_array2

Clear_costmap_recovery - Different parameter syntax