explicit add test-unit gem, because it is out of ruby standard lib since ruby 2.2
explicit add test-unit gem, because it is out of ruby standard lib since ruby 2.2

ibnc/eb_deployer,nitheeshp/eb_deployer,ibnc/eb_deployer,ThoughtWorksStudios/eb_deployer,warnergodfrey/eb_deployer,ThoughtWorksStudios/eb_deployer,warnergodfrey/eb_deployer,mefellows/eb_deployer,mefellows/eb_deployer,nitheeshp/eb_deployer