where is move_arm_msgs on ROS electric?

edit

I just ran the following set of commands at the root of my source tree:

perl -e "s/motion_planning_msgs/arm_navigation_msgs/g;" -pi $(find -type f)
perl -e "s/move_arm_msgs/arm_navigation_msgs/g;" -pi $(find -type f)
perl -e "s/collision_environment_msgs/arm_navigation_msgs/g;" -pi $(find -type f)
perl -e "s/planning_environment_msgs/arm_navigation_msgs/g;" -pi $(find -type f)

The move_arm_msgs now, are included in arm_navigation_msgs