Update git submodules

* Update docs/submodules/functest from branch 'master'
  - Add dependency for clover_k8s testcase

    Clover testcase hook patch:
      https://gerrit.opnfv.org/gerrit/#/c/54541/

    functest-kubernetes patch:
      https://gerrit.opnfv.org/gerrit/#/c/54543/

    Tiny fix: remove -e for stor4nfv-tests

    Change-Id: I68faafa2098ed304fbec2bcd647b258073b4f0c2
    Signed-off-by: QiLiang <liangqi1@huawei.com>

diff --git a/docs/submodules/functest b/docs/submodules/functest
index d74e441..88790b3 160000 (submodule)
--- a/docs/submodules/functest
+++ b/docs/submodules/functest
@@ -1 +1 @@
-Subproject commit d74e44111256bdb3779a66b3bf9c073bdb081d02
+Subproject commit 88790b327f7232aa14c11820c6029bf7412bbfed