Merge branch 'gt/unit-test-hashmap'

An existing test of hashmap API has been rewritten with the
unit-test framework.

* gt/unit-test-hashmap:
  t: port helper/test-hashmap.c to unit-tests/t-hashmap.c

diff --cc Makefile
index 13890710f80852cf597e70704a21af057ebb0893,74bb02661032ce3b3c645c5a0aa46d7ca73ba4c4..a87e18b317d5b58c7544e76e68dd198a06a24d68
--- 1/Makefile
--- 2/Makefile
+++ b/Makefile
@@@ -1335,8 -1336,8 +1335,9 @@@ THIRD_PARTY_SOURCES += sha1dc/
  UNIT_TEST_PROGRAMS += t-ctype
  UNIT_TEST_PROGRAMS += t-example-decorate
  UNIT_TEST_PROGRAMS += t-hash
+ UNIT_TEST_PROGRAMS += t-hashmap
  UNIT_TEST_PROGRAMS += t-mem-pool
 +UNIT_TEST_PROGRAMS += t-oidmap
  UNIT_TEST_PROGRAMS += t-oidtree
  UNIT_TEST_PROGRAMS += t-prio-queue
  UNIT_TEST_PROGRAMS += t-reftable-basics