ec: Temporary fix for quota.t

This fix solves a problem with tests/basic/ec/quota.t that generates
a segmentation fault in DHT.

This is a temporary fix until bug #1167793 is solved.

Change-Id: I8587e66a63375ba2b312e8c0bfa1dd0d94d4c19f
BUG: 1129939
Signed-off-by: Xavier Hernandez <xhernandez@datalab.es>
Reviewed-on: http://review.gluster.org/9222
Reviewed-by: Raghavendra G <rgowdapp@redhat.com>
Tested-by: Gluster Build System <jenkins@build.gluster.com>
Reviewed-by: Vijay Bellur <vbellur@redhat.com>