Rename headers from .h to .hpp (#296)

* Rename headers from .h to .hpp per ROS2 guidelines

This change is the result of the following command run from pcl_ros dir:

$ find -name *.h | xargs -I {} mv {} {}pp

Signed-off-by: Sean Kelly <sean@seankelly.dev>

* Update internal includes for the renamed headers

This change was the result of the following bash script:

$ find -name *.h -o -name *.cpp -o -name *.hpp | xargs -I {} sed -i 's/\(pcl_ros\/.*\)\(h\)\([">]\)$/\1\2pp\3/g' {}

Signed-off-by: Sean Kelly <sean@seankelly.dev>

pcl_ros/src/test/test_tf_message_filter_pcl.cpp

@@ -41,7 +41,7 @@
 #include <boost/bind.hpp>
 #include <boost/scoped_ptr.hpp>
 
-#include <pcl_ros/point_cloud.h>
+#include <pcl_ros/point_cloud.hpp>
 #include <pcl_conversions/pcl_conversions.h>
 
 #include <ros/ros.h>