Update git submodules

* Update zaqar from branch 'master'
  to 27b5b2323727f5c8b73f8ed8e51881eb12a91d0c
  - Refactor RequestContext

    Drop the redundant implementations and use the base code as much as
    possible.

    Change-Id: I36eacc1084d3016ce60c830ffff2c286a88f399c
    Signed-off-by: Takashi Kajinami <kajinamit@oss.nttdata.com>

diff --git a/zaqar b/zaqar
index a37ee8ef7239ea1067efa59c7493445566a82237..27b5b2323727f5c8b73f8ed8e51881eb12a91d0c 160000 (submodule)
--- a/zaqar
+++ b/zaqar
@@ -1 +1 @@
-Subproject commit a37ee8ef7239ea1067efa59c7493445566a82237
+Subproject commit 27b5b2323727f5c8b73f8ed8e51881eb12a91d0c