Add test purpose to fw_e2e_coverage_summarizer.go

This CL also does a bit of renaming to be more consistent with the names
used in Autotest control files:
* "Owners" becomes "Authors"
* "Description" becomes "Purpose"

BUG=None
TEST=Run script, inspect output

Change-Id: I1543fb0e99a893294c5b77af6d52cbbb1593afa5
Signed-off-by: Greg Edelston <gredelston@google.com>
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/crostestutils/+/1880069
Reviewed-by: Kevin Shelton <kmshelton@chromium.org>
Commit-Queue: Kevin Shelton <kmshelton@chromium.org>
1 file changed