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
it's preferred to just access this within the template as `<%= node[:cpu][:total] %>`. Placing this attribute here will actually cause it to be determined at compile time regardless of what a cookbook wrapper author specifies.