Remove dup tests

integration/server_test.go/TestCreateNumberUsername == integration-cli/docker_cli_run_test.go/TestUserByID
integration/server_test.go/TestRmi == integration-cli/docker_cli_images_test.go/TestCLIImageTagRemove

Docker-DCO-1.1-Signed-off-by: Brian Goff <cpuguy83@gmail.com> (github: cpuguy83)