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

This reverts commit cc2e007b1f30f4f2029d08e7a67b5bdf23f31a44.
Revert "Trimmed the branch to only the jsk_pcl_ros sub directory"

This reverts commit 40cd9d195afa651db641bc8aaab31c204372c6b8.
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