Update git submodules

* Update docs/submodules/kvmfornfv from branch 'master'
  - [fuel-plugin] Set default grub entry for kernel

    JIRA: KVMFORNFV-77
    Change-Id: Ibb764cd5fa9822d337ce6f948bff8213c1caa7eb
    Signed-off-by: Paul Vaduva <Paul.Vaduva@enea.com>
    Signed-off-by: Michael Polenchuk <mpolenchuk@mirantis.com>

diff --git a/docs/submodules/kvmfornfv b/docs/submodules/kvmfornfv
index 3a2eb75..e797a9f 160000 (submodule)
--- a/docs/submodules/kvmfornfv
+++ b/docs/submodules/kvmfornfv
@@ -1 +1 @@
-Subproject commit 3a2eb75a5ba494161655c84a23d11eb9f6a797e9
+Subproject commit e797a9f954797949f676a46f5c9ceb31874f919a