Switch LVS servers to include standard

LVS servers seem to not have an NTP client, which resulted in having
their clocks drifted away.  Instead of including that, switch the
include from "base" to "standard".

This means that they will also include:
  - exim::simple-mail-sender
  - generic::tcptweaks which adjusts the initcwnd

Change-Id: I56715822d2b90b9bf4ba4c634e4c829992bf2730