Update git submodules

* Update docs/submodules/dovetail from branch 'stable/fraser'
  - Updating OVP addendum doc for 2018.09 release

    Updating the OVP addendum document for the next release.

    JIRA: DOVETAIL-733

    Change-Id: I7b7679f96bff4837f69769bb71256bc30602dced
    Signed-off-by: Georg Kunz <georg.kunz@ericsson.com>
    (cherry picked from commit af5b4a7be1f23c70e78f2854c5a0b67f09bb5be0)

diff --git a/docs/submodules/dovetail b/docs/submodules/dovetail
index 3c1848c..5cf7a06 160000 (submodule)
--- a/docs/submodules/dovetail
+++ b/docs/submodules/dovetail
@@ -1 +1 @@
-Subproject commit 3c1848c52e7483219e99f5fe2bf5953c38f9a474
+Subproject commit 5cf7a06c5bed1139821ac5e0a95e5db5caa761f3