The initial connection check with MidoNet API was impliemented as a
MidonetCLI command, which ended up printing a garbage that is a result
of the connection check query to the API. This CL performs querying
directly via MidonetCLI to avoid cluttering.

Fix MN-1231
Merge pull request #113 from midokura/dev/tomohiko/mn-1231-v1.3/20140210

The initial connection check with MidoNet API was impliemented as a