release grid based_sweep_coverage_path_planner.py

Author: AtsushiSakai

tests/test_grid_based_sweep_coverage_path_planner.py

@@ -3,6 +3,7 @@
 from unittest import TestCase
 
 sys.path.append(os.path.dirname(os.path.abspath(__file__)) + "/../PathPlanning/GridBasedSweepCPP")
+sys.path.append(os.path.dirname(os.path.abspath(__file__)) + "/../Mapping/grid_map_lib")
 try:
     import grid_based_sweep_coverage_path_planner
 except: