Mod to ROS CMakeLists.txt so tests are built.
Mod to ROS CMakeLists.txt so tests are built.

 * Catkin builds tests at test run time rather than at build time
 * Modified CMakeLists.txt to set test to build at build time,
   because we are not triggerting tests to run through catkin,
   and so they would fail because they are not built.

billhoffman/drake,billhoffman/drake,billhoffman/drake,billhoffman/drake,billhoffman/drake,sheim/drake,sheim/drake,sheim/drake,sheim/drake,billhoffman/drake,sheim/drake,billhoffman/drake,sheim/drake,billhoffman/drake,sheim/drake,sheim/drake