Description of problem:
When the quota_fsck script is run on a gluster filesystem with mismatch,
it errors out with the followinf errors in a certain scenario.

python quota_fsck.py /bricks/brick4/v > output_brick
getfattr: Removing leading '/' from absolute path names
getfattr: Removing leading '/' from absolute path names
Traceback (most recent call last):
  File "quota_fsck.py", line 374, in <module>
    walktree(brick_path, hard_link_dict)
  File "quota_fsck.py", line 317, in walktree
    verify_file_xattr(pathname, stbuf)
  File "quota_fsck.py", line 236, in verify_file_xattr
    print_msg(QUOTA_SIZE_MISMATCH, path, xattr_dict, stbuf)
  File "quota_fsck.py", line 64, in print_msg
    print('%-24s %-60s %-12i %-12i' % {"Size Mismatch", path, xattr_dict['contri_size'],
KeyError: 'contri_size'
============================

Version-Release number of selected component (if applicable):
mainline on release-7 as well.

How reproducible:


Steps to Reproduce:
1. Create a quota mismatch
2. run the fsck script on the backend
3. it will error out.

Actual results:
python quota_fsck.py /bricks/brick4/v > output_brick
getfattr: Removing leading '/' from absolute path names
getfattr: Removing leading '/' from absolute path names
Traceback (most recent call last):
  File "quota_fsck.py", line 374, in <module>
    walktree(brick_path, hard_link_dict)
  File "quota_fsck.py", line 317, in walktree
    verify_file_xattr(pathname, stbuf)
  File "quota_fsck.py", line 236, in verify_file_xattr
    print_msg(QUOTA_SIZE_MISMATCH, path, xattr_dict, stbuf)
  File "quota_fsck.py", line 64, in print_msg
    print('%-24s %-60s %-12i %-12i' % {"Size Mismatch", path, xattr_dict['contri_size'],
KeyError: 'contri_size'
============================

Expected results:
should not error out.


Additional info: