Use mockito2 in testing target
Use mockito2 in testing target

Reviewed By: colriot

Differential Revision: D23007035

fbshipit-source-id: 48baf19e3c9d749f8f62650dcf96846a209c34b7

facebook/litho,facebook/litho,facebook/litho,facebook/litho,facebook/litho,facebook/litho