LU-12846 tests: verify orphan upgrade compatibilty

LU-12846 tests: verify orphan upgrade compatibilty

There was a discussion in LU-13070 that name compatibility
is useless, because orphan's name is not taken into account
in orphans deletion loop.

This test shows that orphan with a name format before 2.11
can not be deleted in mdd_orphan_destroy() that can lead
to an endless loop:

    mdd_orphan_destroy() t32fs-MDD0000: could not delete
        orphan [0x200000bd0:0x1:0x0]: rc = -2

Print a banner in each test_32 subtest to separate images.

Test-Parameters: trivial testlist=conf-sanity envdefinitions=ONLY=32,ONLY_REPEAT=4
Signed-off-by: Artem Blagodarenko <artem.blagodarenko@hpe.com>
Change-Id: I351ff3e5f3d10dabfd76cb1c9f07d3fc597004a6
Reviewed-on: https://review.whamcloud.com/37636
Tested-by: Maloo <maloo@whamcloud.com>
Tested-by: jenkins <devops@whamcloud.com>
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>
Reviewed-by: Yang Sheng <ys@whamcloud.com>