Update git submodules

* Update docs/submodules/fuel from branch 'master'
  - Update qemu/libvirt on compute nodes

    Get qemu package with fix of TSC frequency mismatch between instance
    and host which breaks up nova pause/unpause operation.

    JIRA: FUEL-368
    Change-Id: I2c954b2b0a8cddca30c861f565b63b642e0b0e9f
    Signed-off-by: Michael Polenchuk <mpolenchuk@mirantis.com>

diff --git a/docs/submodules/fuel b/docs/submodules/fuel
index cfc5988..0a86dbb 160000 (submodule)
--- a/docs/submodules/fuel
+++ b/docs/submodules/fuel
@@ -1 +1 @@
-Subproject commit cfc5988be48d1317244e71fd7919480db18745d4
+Subproject commit 0a86dbb986bc0c22fae07dc489c21ce185a5540b