labstore1003: Re-return to Precise

Trusty installer has issues that I have no time to debug
anymore.  :-(  Apparently unrelated to the known issue with
Precise when the ixgbe driver is present.

Change-Id: I7655542bb0fddf275d8685cf9effbc00d19c822b
Merge "labstore1003: Re-return to Precise" into production