Merge branch 'cp/unit-test-reftable-record'

Merge branch 'cp/unit-test-reftable-record'

A test in reftable library has been rewritten using the unit test
framework.

* cp/unit-test-reftable-record:
  t-reftable-record: add tests for reftable_log_record_compare_key()
  t-reftable-record: add tests for reftable_ref_record_compare_name()
  t-reftable-record: add index tests for reftable_record_is_deletion()
  t-reftable-record: add obj tests for reftable_record_is_deletion()
  t-reftable-record: add log tests for reftable_record_is_deletion()
  t-reftable-record: add ref tests for reftable_record_is_deletion()
  t-reftable-record: add comparison tests for obj records
  t-reftable-record: add comparison tests for index records
  t-reftable-record: add comparison tests for ref records
  t-reftable-record: add reftable_record_cmp() tests for log records
  t: move reftable/record_test.c to the unit testing framework