Update git submodules

* Update docs/submodules/functest from branch 'master'
  - Get aarch64 image metadata for cinder and vping testcase

    Image metadata for cinder and vping tests is no longer set for ARM

    Change-Id: I2ab8e6ce55c6e619b96e49ecec7afe727a902345
    Signed-off-by: Delia Popescu <delia.popescu@enea.com>

diff --git a/docs/submodules/functest b/docs/submodules/functest
index 1e1dd28..c944ba0 160000 (submodule)
--- a/docs/submodules/functest
+++ b/docs/submodules/functest
@@ -1 +1 @@
-Subproject commit 1e1dd28bc538e8a00fdffecb879a2f1acfad903e
+Subproject commit c944ba0ae455c57e268f687128a9332ea3351e11