Update git submodules

* Update docs/submodules/fuel from branch 'master'
  - Merge "[baremetal] Update openstack version to pike"
  - [baremetal] Update openstack version to pike

    Change-Id: If4208e937734df72b10aad259c65a2617ff5e19c
    Signed-off-by: Michael Polenchuk <mpolenchuk@mirantis.com>

diff --git a/docs/submodules/fuel b/docs/submodules/fuel
index c976700..9b94e9c 160000 (submodule)
--- a/docs/submodules/fuel
+++ b/docs/submodules/fuel
@@ -1 +1 @@
-Subproject commit c976700c1e8702881f67f3306a67d56c9f78c327
+Subproject commit 9b94e9cdbaa76c39aabd7d6aa5befdce92a66a67