Update git submodules

* Update docs/submodules/fuel from branch 'master'
  - [ha] Update pymysql to version 0.8

    * get latest pymysql from UCA repo
    * set DB connection recycle time to avoid issue with broken database
      connection during query (MySQL server has gone away)
    * set haproxy source balacing mode for neutron API to avoid race
      condition with duplicate security groups
    * get libvirt/qemu from UCA repo on compute nodes since main process
      of libvirt exits (is killed by 11/SEGV [segfault]) during volume
      attaching operation

    Change-Id: Iead5ecc561683876c476357f4a4de8780775aa7b
    Signed-off-by: Michael Polenchuk <mpolenchuk@mirantis.com>

diff --git a/docs/submodules/fuel b/docs/submodules/fuel
index 8c6edbc..3772a3e 160000 (submodule)
--- a/docs/submodules/fuel
+++ b/docs/submodules/fuel
@@ -1 +1 @@
-Subproject commit 8c6edbc3875a1574175b7263b566c57704ea718a
+Subproject commit 3772a3e49e09f6cf9864c56a3ac0170cc0134329