LU-11689 lfs: make sure project proceed all dirs

LU-11689 lfs: make sure project proceed all dirs

Leftover fix since LU-10986 lfs: make lfs project tolerant errors
We should proceed other dirs if we hit errors, otherwise,
some dirtree like following will fail if aaaa not exists.

testdir/
├── subdir
│   └── 1
├── bbbb -> aaaa
└── cccc

Also remove extra error output since we have output failing
messages inside every action function.

Lustre-change: https://review.whamcloud.com/33707
Lustre-commit: e022922fb4a2429d0c2488a13ad8127c068aa2b8

Signed-off-by: Wang Shilong <wshilong@ddn.com>
Change-Id: I0062dbc3f4d1925c9e9e1a509ee35ac569bd9b74
Reviewed-on: https://review.whamcloud.com/34103
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>
Tested-by: Jenkins
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>