cluster/ec: return all node uuids from all subvolumes

EC was retuning the UUID of the brick with smaller value. This had
the side effect of not evenly balancing the load between bricks on
rebalance operations.

This patch modifies the common functions that combine multiple subvolume
values into a single result to take into account the subvolume order
and, optionally, other subvolumes that could be damaged.

This makes easier to add future features where brick order is important.
It also makes possible to easily identify the originating brick of each
answer, in case some brick will have an special meaning in the future.

>Change-Id: Iee0a4da710b41224a6dc8e13fa8dcddb36c73a2f
>BUG: 1366817
>Signed-off-by: Xavier Hernandez <xhernandez@datalab.es>
>Reviewed-on: https://review.gluster.org/17297
>Smoke: Gluster Build System <jenkins@build.gluster.org>
>NetBSD-regression: NetBSD Build System <jenkins@build.gluster.org>
>CentOS-regression: Gluster Build System <jenkins@build.gluster.org>
>Reviewed-by: Ashish Pandey <aspandey@redhat.com>
>Reviewed-by: Pranith Kumar Karampuri <pkarampu@redhat.com>

BUG: 1487042
Change-Id: Iee0a4da710b41224a6dc8e13fa8dcddb36c73a2f
Signed-off-by: Sunil Kumar Acharya <sheggodu@redhat.com>
Reviewed-on: https://review.gluster.org/18148
CentOS-regression: Gluster Build System <jenkins@build.gluster.org>
Smoke: Gluster Build System <jenkins@build.gluster.org>
Reviewed-by: Xavier Hernandez <xhernandez@datalab.es>
NetBSD-regression: NetBSD Build System <jenkins@build.gluster.org>

0 files changed, 0 insertions, 0 deletions