Update git submodules

* Update docs/submodules/functest from branch 'master'
  - Blacklist Quotas.nova_update_and_delete test

    Excluded since the test occasionally fails due to race condition issue
    on quota manipulation in nova [1].

    [1] https://bugs.launchpad.net/nova/+bug/1552622

    Change-Id: Ib979c1e371727aa3adea9dc0b5955e7ed24881cf
    Signed-off-by: Juha Kosonen <juha.kosonen@nokia.com>

diff --git a/docs/submodules/functest b/docs/submodules/functest
index e0aa936..5da3abf 160000 (submodule)
--- a/docs/submodules/functest
+++ b/docs/submodules/functest
@@ -1 +1 @@
-Subproject commit e0aa936b1f3526e3e519cdf9aabf9be6247c7762
+Subproject commit 5da3abf280d41e145da4e52b95836359f380875a