Renamed mock data and associated tests to shorten file names

[MattHyman]

Renamed mock data and associated tests to shorten file names by introducing the concept of a friendly operating system version to refer to mock file names instead of the full OS version. For the current Xbox mock tests this allows replacing "14385_1002_amd64fre_rs1_xbox_rel_1608_160709_1700" with just "rs1_1608" resulting in file names being shortened from _XboxOne_14385_1002_amd64fre_rs1_xbox_rel_1608_160709_1700 to _XboxOne_rs1_1608. The traditional OS Version is still needed when testing the DevicePortal's OperatingSystemVersion property.

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[WilliamsJason]

I don't love this. Feels very xbox specific when this should work for all devices.

Maybe instead of looking for fre, you could work backwards? Basically remove everything from the last period on, then remove everything from the last period forward. So you go from this:
14385.1002.amd64fre.rs1_xbox_rel_1608.160709-1700
to this:
14385.1002.amd64fre.rs1_xbox_rel_1608
to this:
rs1_xbox_rel_1608.

Then we can either keep with that, or if you really want to drop to just rs1_1608 maybe we can drop anything between underscores?

So if another platform OS came out of rs1_release, they'll just get rs1_release since there are no extra underscores, but if they shipped out of, say, rs1_onecore_dep_dart_dev1, they'd get the nice short rs1_dev1 ?

I wish I knew a bit more about other devices shipping branches to be 100% confident this would always function well, but I think that's a decent start without anything xbox specific.

Thoughts?

[MattHyman]

I agree that Xbox specific is not the right option here. Let us just go down to the branch name, in this case rs1_xbox_rel_1608, to avoid overcomplicating things and backing us into a corner in the future. That being said, the concept of an "friendly OS version" gives us flexibility to change this scheme in the future but leave existing tests/files alone.