Fixed completely broken integration-cli tests

The tests weren't ... tested when last edited, this patch fixes them so that they run and pass correctly.

```
+ go test github.com/dotcloud/docker/integration-cli
# github.com/dotcloud/docker/integration-cli
./docker_cli_links_test.go:24: cannot use "run" (type string) as type *testing.T in function argument
./docker_cli_links_test.go:26: cannot use "run" (type string) as type *testing.T in function argument
./docker_cli_links_test.go:27: cannot use "kill" (type string) as type *testing.T in function argument
./docker_cli_links_test.go:28: cannot use "kill" (type string) as type *testing.T in function argument
FAIL    github.com/dotcloud/docker/integration-cli [build failed]
```

/cc @shykes