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
nope! consul changed the default (adding a new relative path) - I fixed the serverspec for it.... I think someone else might have patched the path in the meantime.