Comment 1 for bug 638468

I've updated https://dev.launchpad.net/QAProcessContinuousRollouts adding a note that ec2 land should discard Fix Released and Fix Committed bugs. If the landing isn't explicitly set as no-qa and ec2 land finds no bugs, the command should fail.

This change is required because devels are reusing branches and ec2 land uses the bugs linked to branches, not linked to MPs (there's no such thing, I believe). Because of that tagger script is tagging a lot of already fix released bugs, retargeting milestones and lots of similar things that can make the whole QA process a mess.