GOMAXPROCS picks number of CPUs using sysconfig - Also updated Serverspec to 2.0

Current server spec installation will use 2.0 - which means i have to
change spec_helper and matchers.

Also consul uses the ui with an extra relative folder consul_ui - that
had to be fixed for server spec to pass
If the default is one then we should keep it at that. You're setting `GOMAXPROCS` to 2 if it is undefined.