Update git submodules

* Update docs/submodules/clamp.git from branch 'master'
  to 286492027e88f2463d6b91e670e6f5f3712888ab
  - Merge "Payload is expected as string in operational policy"
  - Payload is expected as string in operational policy

    1. converted json to string for legacy operational policy
    2. added payload data as default string value for generic operational policy

    Change-Id: If63423c24d736623b227537f0f83edeaac819215
    Issue-ID: CLAMP-831
    Signed-off-by: Vidyashree-Huawei <vidyashree.rama@huawei.com>

diff --git a/docs/submodules/clamp.git b/docs/submodules/clamp.git
index 17edc3c..2864920 160000 (submodule)
--- a/docs/submodules/clamp.git
+++ b/docs/submodules/clamp.git
@@ -1 +1 @@
-Subproject commit 17edc3c718345d4e2e1b045ccec776dab300abbb
+Subproject commit 286492027e88f2463d6b91e670e6f5f3712888ab