SAM test CE-sft-posix now running.

After deployment mistakes and corrections the CE-sft-posix test is now running again. The significant change is that now new SEs that appear pass for the first two weeks. Previously they were guaranteed to fail for the first two weeks. The results look promising in that out of 287 CEs tested today 69 or so look to fail. This includes the 10 or so CERN CEs where there may be a problem with the configuration of the atlas-durable and lhcb-durable SRMs but perhaps only with respect to the OPS vo which is probably not well tested. Next step will be to get CERN passing. Need to have my own house in order before proceeding. Following that go through the other failiures to look if they seem fair.