Adds a vmwaretools_tools_version fact, combining vmware and vmware_patchlevel

This should make puppet-vmwaretools install the correct version of
vmware-tools by default.
Update for ESX 5.5

I haven't seen this in the wild *yet*, but it's correct according to
WebDrive and
https://github.com/craigwatson/puppet-vmwaretools/blob/master/lib/facter/esx_version.rb