Update git submodules

* Update docs/submodules/clamp.git from branch 'master'
  to 504422fe7b93714222ff53b9ee9914a26b74c091
  - Update SSL Certs and doc

    Update SSL certs for Frankfurt (expiry date Feb 2021) + fix clamp env
    for compose.
    Documentation updated to reflect what to do for cert renewal (readme).

    Issue-ID: CLAMP-641
    Signed-off-by: ChrisC <christophe.closset@intl.att.com>
    Change-Id: I24e24ee88674c3d5b399bc0f1722c61f4c54a937

diff --git a/docs/submodules/clamp.git b/docs/submodules/clamp.git
index 8d91398..504422f 160000 (submodule)
--- a/docs/submodules/clamp.git
+++ b/docs/submodules/clamp.git
@@ -1 +1 @@
-Subproject commit 8d91398da6162c19643f3f7cae83327dd4e81263
+Subproject commit 504422fe7b93714222ff53b9ee9914a26b74c091