Moved include_directories(catkin_...) ahead of other calls.
Before this, the pr2_moveit_tests would use moveit include files from /opt/ros/hydro
instead of those from the current catkin workspace.  That meant that any time one of those
include files changed, tests would fail here because they would use the wrong versions of
the include files.
Merge pull request #50 from ros-planning/workspace-includes-before-system

Fixed test failures that happen when moveit include files change.