node-test-commit-v8-linux: use test-nearform_intel-ubuntu1604-x64-1 instead of infra-softlayer-ubuntu1404-x64-2

[mmarchini]

While trying to fix the CI issues reported in nodejs/node#21334 I found out we use an infra-softlayer-ubuntu1404-x64-2 in node-test-commit-v8-linux. This is an infra machine, so not everyone from the Build WG has access to it. Since this is a test job and is run quite frequently, it would be a good idea to change the machine to a test machine. @refack suggested test-nearform_intel-ubuntu1604-x64-1.

I added test-nearform_intel-ubuntu1604-x64-1 to node-test-commit-v8-linux, but kept infra-softlayer-ubuntu1404-x64-2 since I was not sure if we needed to support Ubuntu 14.04 in that job. Can we remove infra-softlayer-ubuntu1404-x64-2 from node-test-commit-v8-linux, or should we keep it?

[mhdawson]

For history, we used the benchmarking machine initially (which is now infra-softlayer-ubuntu1404-2) to avoid interference with regular CI runs.

We want the job to run on at least one x86 linux box. I like having it run on an older OS versus a newer one as it may be more likely to expose issues as V8 continues to push forward with using newer compiler (and possibly OS) features.

[mmarchini]

@mhdawson thanks for the context! I don't have strong opinions regarding which machine we should use, as long as it's accessible by people with test-* credentials.

[mhdawson]

The machine really should be benchmarking-xxxx but I'll have to see if it was always infra-xxx or was renamed to that for some reason along the way.

[refack]

Since 1404 reached EOL I believe it's time to retire it from the job.