Merge branch 'sk/unit-test-oid'

Convert a few unit tests to the clar framework.

* sk/unit-test-oid:
  t/unit-tests: convert oidtree test to use clar test framework
  t/unit-tests: convert oidmap test to use clar test framework
  t/unit-tests: convert oid-array test to use clar test framework
  t/unit-tests: implement clar specific oid helper functions

diff --cc Makefile
Simple merge

diff --cc t/meson.build
Simple merge