Move aura Chrome PFQ to bare metal machine so it can run VMTests.
Move aura Chrome PFQ to bare metal machine so it can run VMTests.

Also move x86 Chrome PFQ from 48 core machine to 16 core machine so that
48 core machines aren't wasted.

BUG=chromium-os:25027
TEST=Run local waterfall, verify new configuration.
Review URL: http://codereview.chromium.org/9139073

git-svn-id: 239fca9b83025a0b6f823aeeca02ba5be3d9fd76@117512 0039d316-1c4b-4281-b951-d872f2087c98

eunchong/build,eunchong/build,eunchong/build,eunchong/build