tpm_manager: nvram unit test cleanup

Fixed EXPECT_EQ() clauses to list expected first, actual second.
Introduced global constant to indicate when the specific nvram
index or size are not important.
Misc changes to better convey the underlying meaning of absolute
values used in tests.

BUG=none
TEST=unit tests

Change-Id: I2e7b9e949e1f20b1cfd85f36d56881a3d6d011ac
Reviewed-on: https://chromium-review.googlesource.com/440108
Commit-Ready: Andrey Pronin <apronin@chromium.org>
Tested-by: Andrey Pronin <apronin@chromium.org>
Reviewed-by: Ben Chan <benchan@chromium.org>
1 file changed