Update git submodules

* Update docs/submodules/dovetail from branch 'master'
  - New test specs for ha database/controller_restart

    New test specifications have been created for dovetail project.
    Test descriptions are related to test cases:
    - dovetail.ha.database
    - dovetail.ha.controller_restart

    JIRA: DOVETAIL-680
    JIRA: DOVETAIL-681

    Change-Id: I632cb69f9166a46e76f38a467f078fe5f31b63b3
    Signed-off-by: Panagiotis Karalis <pkaralis@intracom-telecom.com>

diff --git a/docs/submodules/dovetail b/docs/submodules/dovetail
index cd122a0..9d68899 160000 (submodule)
--- a/docs/submodules/dovetail
+++ b/docs/submodules/dovetail
@@ -1 +1 @@
-Subproject commit cd122a0884564060743677548a4e522a9d8199c3
+Subproject commit 9d688995687a701ac1b5572e74b6c028885c92ea