Move debug printer code to own header

unit_tests/engine/douglas_peucker.cpp

@@ -1,5 +1,6 @@
 #include "engine/douglas_peucker.hpp"
 #include "util/coordinate_calculation.hpp"
+#include "util/debug.hpp"
 
 #include <boost/test/test_case_template.hpp>
 #include <boost/test/unit_test.hpp>

unit_tests/partitioner/bisection_graph.cpp

@@ -1,6 +1,8 @@
 #include "partitioner/bisection_graph.hpp"
 #include "partitioner/graph_generator.hpp"
 
+#include "util/debug.hpp"
+
 #include <algorithm>
 #include <vector>
 

unit_tests/partitioner/bisection_graph_view.cpp

@@ -2,6 +2,8 @@
 #include "partitioner/graph_generator.hpp"
 #include "partitioner/recursive_bisection_state.hpp"
 
+#include "util/debug.hpp"
+
 #include <algorithm>
 #include <climits>
 #include <vector>

unit_tests/server/parameters_parser.cpp

@@ -10,6 +10,8 @@
 #include "engine/api/tile_parameters.hpp"
 #include "engine/api/trip_parameters.hpp"
 
+#include "util/debug.hpp"
+
 #include <boost/optional/optional_io.hpp>
 #include <boost/test/test_tools.hpp>
 #include <boost/test/unit_test.hpp>

unit_tests/util/coordinate_calculation.cpp

@@ -4,6 +4,7 @@
 #include "util/bearing.hpp"
 #include "util/coordinate_calculation.hpp"
 #include "util/web_mercator.hpp"
+#include "util/debug.hpp"
 
 #include <osrm/coordinate.hpp>