Revert "comment out ml_classifiers that is not have entory in rosdep"

This reverts commit 74650f8db7b3a2dc0d9246f80e300eed109d5e65.
Revert "Trimmed the branch to only the jsk_pcl_ros sub directory"

This reverts commit cf9e59808812cd3c48040fe2b1c5689c0b85b24a.
Rebase from 'upstream'
Trimmed the branch to only the jsk_pcl_ros sub directory
comment out ml_classifiers that is not have entory in rosdep