While there, change to uppercase letters to match v2 style.

*Risk Level*: n/a
*Testing*: bazel test //test/...
*Docs Changes*: n/a
*Release Notes*: n/a

Signed-off-by: Piotr Sikora <[email protected]>
(cherry picked from commit a614808b9aab7cfd94d66a307a8b65c6c7890097)

Signed-off-by: Matt Klein <[email protected]>