Update git submodules

* Update docs/submodules/dovetail from branch 'master'
  - Remove identity v2 TCs,not supported by Functest

    As Functest does not support identity v2 anymore,
    it does not make sense to try to run tempest identity v2 tests.
    They need to be removed correspondingly.

    JIRA: DOVETAIL-735

    Change-Id: I09c06faf52893cc535bbed1fd406b81a7665e787
    Signed-off-by: Panagiotis Karalis <pkaralis@intracom-telecom.com>

diff --git a/docs/submodules/dovetail b/docs/submodules/dovetail
index 0727b54..c266472 160000 (submodule)
--- a/docs/submodules/dovetail
+++ b/docs/submodules/dovetail
@@ -1 +1 @@
-Subproject commit 0727b542015f7f3718eda435396d34aec5ac1c80
+Subproject commit c266472c9dea9f1a3d58e9a70f761d792ac798dd