Merge pull request #5280 from ceph/wip-12384-hammer

librbd: add valgrind memory checks for unit tests

Reviewed-by: Loic Dachary <ldachary@redhat.com>

diff --cc src/test/Makefile-client.am
Simple merge

diff --cc src/test/librbd/test_internal.cc
Simple merge

diff --cc src/test/librbd/test_librbd.cc
Simple merge

diff --cc src/test/librbd/test_main.cc
Simple merge