Bring in newer glusterfs for mtime unsplit brain

Bring in newer glusterfs for mtime unsplit brain

Recent commit 8ba3a1a (Switch nofeature-ha compute nodes to UCA repo)
bumped the reclass/system submodule and brought in upstream commit
2ee306b (Glusterfs: use automatic mtime-based split-brain resolution)
which requires support for "cluster.favorite-child-policy", not
available in Glusterfs 3.7.x available in Ubuntu Xenial.
NOTE: UCA does not provide glusterfs for "Ocata", only for "Pike"+.

Instead of reverting the commit switching to mtime brain un-split,
bump glusterfs to a version that is not EOL (3.10) using their
official PPA.

Change-Id: I4606dda2f3d4b7563eea793cc8e5d1380f336f24
Signed-off-by: Alexandru Avadanii <Alexandru.Avadanii@enea.com>
(cherry picked from commit 8a867449217151f59766a74c6165ffc26c7f50b4)