added node defintions for mobile-imaging and foopy servers for the move to scl3.
deleted obsolete foopy definitions for build.scl1.mozilla.com
Merge default -> production

--HG--
branch : production
Backout f9962d45c96e, from Bug 975216 - Please update libxcb on the linux test slaves to a more recent release
Merging from default

changeset:   1605:4cc39a213f9e
tag:         tip
parent:      1603:06bf1bd27ba8
user:        Rail Aliiev <rail@mozilla.com>
date:        Tue Apr 08 13:29:57 2014 -0400
summary:     Backout f9962d45c96e, from Bug 975216 - Please update libxcb on the linux test slaves to a more recent release

--HG--
branch : production
Backout 2b5ac9bc03b6 from Bug 975216 (libxcb update)
Merging from default

changeset:   1607:bd2e451d7de6
tag:         tip
parent:      1605:4cc39a213f9e
user:        Rail Aliiev <rail@mozilla.com>
date:        Tue Apr 08 15:39:29 2014 -0400
summary:     Backout 2b5ac9bc03b6 from Bug 975216 (libxcb update)

--HG--
branch : production