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
I was almost certain it didn't work when I tried without export.... also had a serverspec test for the warning but your kitchen instance only has one CPU so it is not testable at the moment.