Adding labust_common_msgs to documentation index for hydro. Removed labust_ros_pkg from documentation index for groovy. Changed tracking version for labust_ros_pkg in documentation index for hydro.
Reverted the groovy removal.
Merge branch 'master' of https://github.com/ros/rosdistro
Merge pull request #5014 from labust/master

Adding labust_common_msgs to documentation index for hydro