Updated FCOS stream metadata sample/rationale/release

[aaradhak]

To have a complete representation of the artifacts we support in the
stream metadata sample,rationale & release, the FCOS stream metadata sample/
rationale/release have been updated with the missing platforms.

Resolves : https://issues.redhat.com/browse/COS-1364

[bgilbert]

This is the right general idea overall; just needs a few fixes. Thanks for handling this.

[bgilbert]

Looks good generally. A few small problems to fix, including a couple of bugs in the original files.

[miabbott]

In metadata/stream/rationale.yaml, let's make sure all the entries for location and signature are unique for consistency.

For example:

location: https://artifacts.example.com/aeng0xah6vaaVosh.qcow2.xz
signature: https://artifacts.example.com/aeng0xah6vaaVosh.qcow2.xz.sig

...occurs 6 times in that file

[aaradhak]

In metadata/stream/rationale.yaml, let's make sure all the entries for location and signature are unique for consistency.

For example:

location: https://artifacts.example.com/aeng0xah6vaaVosh.qcow2.xz
signature: https://artifacts.example.com/aeng0xah6vaaVosh.qcow2.xz.sig

...occurs 6 times in that file

have changed all location and signature entries to be unique.