Update git submodules

* Update docs/submodules/fuel from branch 'master'
  - Merge "Add missing installation dependency"
  - Add missing installation dependency

    - uuidgen is required for installation
    - Add installation package for both Debian and
      RHEL based linux distribitions

    Change-Id: I9c9bf04e64dc6be1b4e8fb92aea531eccbea33a5
    Signed-off-by: Taseer Ahmed <taseer94@gmail.com>

diff --git a/docs/submodules/fuel b/docs/submodules/fuel
index 41cd7a1..84dc774 160000 (submodule)
--- a/docs/submodules/fuel
+++ b/docs/submodules/fuel
@@ -1 +1 @@
-Subproject commit 41cd7a1e13108f078f3c64a5fc225a6b5a8dc229
+Subproject commit 84dc7744f0b07ce4b9ae1f214bfdda2872122d62