tree 8b936ca291537cebebf6bf505e565bff9635f511
parent 6ab9ad5492b9203c7dd8fb3e8c59d37bbc455cde
author Nan Zhou <nanzhoumails@gmail.com> 1662833501 +0000
committer Nan Zhou <nanzhoumails@gmail.com> 1663803877 +0000

treewide: reorganize unit tests

Like other C++ projects, unit tests normally are in a separate repo and
respect the folder structure of the file under test.

This commit deleted all "ut" folder and move tests to a "test" folder.
The test folder also has similar structure as the main folder.

This commit also made neccessary include changes to make codes compile.
Unused tests are untouched.

Tested: unit test passed.

Reference:
[1] https://github.com/grpc/grpc/tree/master/test
[2] https://github.com/boostorg/core/tree/414dfb466878af427d33b36e6ccf84d21c0e081b/test
[3] Many other OpenBMC repos: https://github.com/openbmc/entity-manager/tree/master/test
[4] https://stackoverflow.com/questions/2360734/whats-a-good-directory-structure-for-larger-c-projects-using-makefile

Signed-off-by: Nan Zhou <nanzhoumails@gmail.com>
Change-Id: I4521c7ef5fa03c47cca5c146d322bbb51365ee96