LU-16052 llog: handle -EBADR for catalog processing

LU-16052 llog: handle -EBADR for catalog processing

Llog catalog processing might retry to get the last llog block
to check for new records if any. That might return -EBADR code
which should be considered as valid. Previously -EIO was
returned in all cases.

Run conf-sanity test_106 several times as specific test

Test-Parameters: testlist=conf-sanity env=ONLY=106,SLOW=yes,ONLY_REPEAT=10
Signed-off-by: Mikhail Pershin <mpershin@whamcloud.com>
Change-Id: I30e04ba2c91c8bdce72c95675a1209639e9f0570
Reviewed-on: https://review.whamcloud.com/48070
Tested-by: jenkins <devops@whamcloud.com>
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Etienne AUJAMES <eaujames@ddn.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>