v2: print test name + flavor info for each test too.
v3: pass dry_run via CR_CT_TEST_INFO

Output looks like this now:

=== Run 1/242 ----------------
Skipping zdtm/transition/thread-bomb (manual run only)
Skipping zdtm/transition/file_aio (manual run only)

======================= Run zdtm/transition/maps007 in h =======================

====================== Run zdtm/transition/maps007 in ns =======================

====================== Run zdtm/transition/maps007 in uns ======================
=== Run 4/242 ----------------
Skipping zdtm/transition/epoll (manual run only)

==================== Run zdtm/transition/pipe_shared00 in h ====================

=================== Run zdtm/transition/pipe_shared00 in ns ====================

=================== Run zdtm/transition/pipe_shared00 in uns ===================
=== Run 6/242 ----------------

======================== Run zdtm/transition/fork in h =========================

======================== Run zdtm/transition/fork in ns ========================

======================= Run zdtm/transition/fork in uns ========================
=== Run 7/242 ----------------
Skipping zdtm/transition/ptrace (manual run only)
Skipping zdtm/transition/socket_loop00 (manual run only)

======================== Run zdtm/transition/ipc in ns =========================
=== Run 10/242 ----------------
Skipping zdtm/transition/netlink00 (manual run only)

===================== Run zdtm/transition/socket-tcp6 in h =====================
=== Run 12/242 ----------------
...
Signed-off-by: Tycho Andersen <tycho.andersen@canonical.com>
Signed-off-by: Pavel Emelyanov <xemul@virtuozzo.com>