Less newlines in RunServer

so output is more compact when starting server.

    $ ~/go/bin/tsr api
    Using the database "tsurudb" from the server "127.0.0.1:27017".
    Using "docker" provisioner.
    Using "native" auth scheme.
    tsuru HTTP server listening at 0.0.0.0:8080...
Merge pull request #1037 from msabramo/less_newlines

Less newlines in RunServer