Update git submodules

* Update docs/submodules/compass4nfv from branch 'master'
  - Merge "Upgrade ODL version to Nitrogen SR1"
  - Upgrade ODL version to Nitrogen SR1

    JIRA: -

    Currently compass uses ODL Nitrogen, however the latest ODL version
    is Nitrogen SR1. So we upgrade to use the latest version to avoid
    some bugs.

    Change-Id: I8cc04955b9fc828eb3bc6096df6ac5b97438a259
    Signed-off-by: Yifei Xue <xueyifei@huawei.com>

diff --git a/docs/submodules/compass4nfv b/docs/submodules/compass4nfv
index 8eb47e0..794d5e9 160000 (submodule)
--- a/docs/submodules/compass4nfv
+++ b/docs/submodules/compass4nfv
@@ -1 +1 @@
-Subproject commit 8eb47e0ac350a4609f3b0573e5a8e3f38b7b44d2
+Subproject commit 794d5e92ebbba3818b23dd35f1399244a43cddfc