Bug 984393: add an upgrade script; r=Callek
bug 962187 - b2g_bumper for v1.4. r=catlee
Bug 984062: Update ccache to 3.1.9 r=dustin
bug 892122: Speed up reconfigs on linux test masters - add more linux test masters in aws. r=catlee
Bug 966070 - add selfserve_agent to bm{70..73}; add two build masters: bm91 and bm94. r=catlee
Bug 984393: update upgrade script to handle the case where /etc/issue.rpmnew isn't created; r=Callek
No bug: add test r4 node in scl3; r=arich
Merge default -> production

--HG--
branch : production