builder/docker: tests for some exec stuff
builder/docker: tests for some exec stuff

TranscendComputing/packer,suma/packer,Kaixiang/packer,Kaixiang/packer,Kaixiang/packer,suma/packer,suma/packer,Kaixiang/packer,suma/packer,TranscendComputing/packer,TranscendComputing/packer,TranscendComputing/packer