cluster/afr: Handle gfid-less directories in heal flow

Summary:
- Updates heal flow to handle case where a directory does not have a
  gfid assigned.  In this case we will remove _only_ empty directories
  in these cases such that the parent can re-gain consistency and files
  within can be correctly healed.
- Also adds a test for the case where a file does not have a gfid, this
  is already handles by the metadata heal flow, but tests were lacking
  for this code path.

Test Plan:
- prove -v tests/basic/shd_autofix_nogfid.t
- prove -v tests/basic/gfid_unsplit_shd.t

Reviewers: dph, moox, sshreyas

Reviewed By: sshreyas

Differential Revision: https://phabricator.fb.com/D2502067

Tasks: 8549168

Change-Id: I8dd3e6a6d62807cb38aafe597eced3d4b402351b
Signed-off-by: Jeff Darcy <jdarcy@fb.com>
Reviewed-on: https://review.gluster.org/17750
Tested-by: Jeff Darcy <jeff@pl.atyp.us>
CentOS-regression: Gluster Build System <jenkins@build.gluster.org>
Smoke: Gluster Build System <jenkins@build.gluster.org>
Reviewed-by: Jeff Darcy <jeff@pl.atyp.us>

0 files changed, 0 insertions, 0 deletions