Migrate some utility tasks to new-style options.

Reviewed at https://rbcommons.com/s/twitter/r/1248/
fix [run.junit] -> [test.junit]

Testing Done:
https://travis-ci.org/jinfeng/jinfeng-pants-fork/builds/39534255

Reviewed at https://rbcommons.com/s/twitter/r/1256/
fix the error msg in favor of the new style arg name

Reviewed at https://rbcommons.com/s/twitter/r/1258/