Add ESXi version 5.1 u2 and u3

[leludo84]

After update my ESXi to 5.1 u3, the bios address change to E9AB0. However, i not sure for u1 or u2 bios date. 5.1u3 tested and OK.

[wolfspyre]

Awesome! Thanks for this! Would you mind adding test coverage for this, as well as giving yourself credit in the readme?

[leludo84]

Thank you. no problem for credit in readme, my name is ludovic Bl. We shoud add a test coverage for the 5.1 U1 and U2 or just a warning. The 5.1 U3 is OK and in production in my datacenter.

For information, in my puppet, i built a special module vmwaretools: i took your facter, a facter giving the vmaretools version, a facter giving the host timesync enabled from another github contributor and a homemade manifest for install vmwaretools. is it possible to gather all vmware facter in only one puppet module one day soon?